# What is CVE-2021-4211?

> CVE-2021-4211 is a medium-severity flaw (CVSS 6.7) in A340-22icb Firmware from Lenovo, published on 22 April 2022. It is not on the list of flaws known to be exploited today. The latest forecast puts its chance of use in the next 30 days at 0.3%. If you run an affected version, plan in the vendor’s fix.

Canonical page: https://www.precursorintelligence.com/what-is/cve-2021-4211

## At a glance

- **Verdict:** Plan it in. No sign of exploitation and a low forecast. Patch it in your normal update cycle.
- **Precursor Intelligence risk score:** 29 out of 100 (Low); action: Monitor. Kept up to date as the evidence changes.
- **Severity:** Medium (CVSS 6.7 out of 10)
- **Known to be exploited:** No, not on the list of flaws known to be exploited today
- **Chance of use in the next 30 days:** 0.3% (latest exploit-likelihood forecast)
- **Published:** 22 April 2022
- **Record last updated:** 11 May 2022
- **Main product:** A340-22icb Firmware from Lenovo
- **Affected products:** 106

## What is CVE-2021-4211? In plain terms

An attacker has to be already on the device with an administrator account, and nobody has to click anything. If it works, the attacker can read data, change data and take it offline.

### The official description

A potential vulnerability in the SMI callback function used in the SMBIOS event log driver in some Lenovo Desktop, ThinkStation, and ThinkEdge models may allow an attacker with local access and elevated privileges to execute arbitrary code.

### What kind of flaw is it?

- CWE-20: Improper Input Validation

### How an attack on it works

- Where an attacker can be: Already on the device
- How hard it is to pull off: Easy: no special conditions
- Login needed first: An administrator account
- Does someone have to click: No, nobody has to do anything
- What an attacker gets: Can read data, change data and take it offline

Severity vector: `CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H`

## Is CVE-2021-4211 being exploited? Not that we know of

It is not on the list of flaws known to be exploited today. The latest forecast puts the chance of it being used in the next 30 days at 0.3%. That can change at any time, which is why we keep watching.

Exploit likelihood over the last 7 days: 0.3%, 0.3%, 0.3%, 0.3%, 0.3%, 0.3%, 0.3%.

### Timeline

- 22 April 2022: Published
- 11 May 2022: Record last updated

### How Precursor Intelligence ranks it

CVE-2021-4211 scores **29 out of 100 (Low)**, with the action "Monitor".

Every published flaw gets a risk score from 0 to 100, kept up to date as the evidence changes. Four things go into the score, from the one that counts most to the ones that count less:

- Evidence it is being exploited: biggest factor
- How severe it is: strong factor
- How widely exposed it is: smaller factor
- Threat activity around it: smaller factor

85 and above is Critical. Anything confirmed as exploited is always marked for an emergency patch, whatever its score. When this flaw matches software you track, it lands in your list with its score and the reasons behind it.

## Who is affected by CVE-2021-4211?

The published record lists 106 products.

- [A340-22icb Firmware](https://www.precursorintelligence.com/product/lenovo/a340-22icb_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [A340-22icb](https://www.precursorintelligence.com/product/lenovo/a340-22icb) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [A340-22ick](https://www.precursorintelligence.com/product/lenovo/a340-22ick) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [A340-22ick Firmware](https://www.precursorintelligence.com/product/lenovo/a340-22ick_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [A340-24icb](https://www.precursorintelligence.com/product/lenovo/a340-24icb) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [A340-24icb Firmware](https://www.precursorintelligence.com/product/lenovo/a340-24icb_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [A340-24ick](https://www.precursorintelligence.com/product/lenovo/a340-24ick) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [A340-24ick Firmware](https://www.precursorintelligence.com/product/lenovo/a340-24ick_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [A540-24icb](https://www.precursorintelligence.com/product/lenovo/a540-24icb) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [A540-24icb Firmware](https://www.precursorintelligence.com/product/lenovo/a540-24icb_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [A540-27icb](https://www.precursorintelligence.com/product/lenovo/a540-27icb) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [A540-27icb Firmware](https://www.precursorintelligence.com/product/lenovo/a540-27icb_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [Ideacentre 5-14iob6](https://www.precursorintelligence.com/product/lenovo/ideacentre_5-14iob6) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Ideacentre 5-14iob6 Firmware](https://www.precursorintelligence.com/product/lenovo/ideacentre_5-14iob6_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [Ideacentre 510s-07icb](https://www.precursorintelligence.com/product/lenovo/ideacentre_510s-07icb) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Ideacentre 510s-07icb Firmware](https://www.precursorintelligence.com/product/lenovo/ideacentre_510s-07icb_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [Ideacentre 510s-07ick](https://www.precursorintelligence.com/product/lenovo/ideacentre_510s-07ick) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Ideacentre 510s-07ick Firmware](https://www.precursorintelligence.com/product/lenovo/ideacentre_510s-07ick_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [Ideacentre Aio 3-22ada6](https://www.precursorintelligence.com/product/lenovo/ideacentre_aio_3-22ada6) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Ideacentre Aio 3-22ada6 Firmware](https://www.precursorintelligence.com/product/lenovo/ideacentre_aio_3-22ada6_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [Ideacentre Aio 3-22iil5](https://www.precursorintelligence.com/product/lenovo/ideacentre_aio_3-22iil5) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Ideacentre Aio 3-22iil5 Firmware](https://www.precursorintelligence.com/product/lenovo/ideacentre_aio_3-22iil5_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [Ideacentre Aio 3-22itl6](https://www.precursorintelligence.com/product/lenovo/ideacentre_aio_3-22itl6) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Ideacentre Aio 3-22itl6 Firmware](https://www.precursorintelligence.com/product/lenovo/ideacentre_aio_3-22itl6_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [Ideacentre Aio 3-24ada6](https://www.precursorintelligence.com/product/lenovo/ideacentre_aio_3-24ada6) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Ideacentre Aio 3-24ada6 Firmware](https://www.precursorintelligence.com/product/lenovo/ideacentre_aio_3-24ada6_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [Ideacentre Aio 3-24iil5](https://www.precursorintelligence.com/product/lenovo/ideacentre_aio_3-24iil5) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Ideacentre Aio 3-24iil5 Firmware](https://www.precursorintelligence.com/product/lenovo/ideacentre_aio_3-24iil5_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [Ideacentre Aio 3-24itl6](https://www.precursorintelligence.com/product/lenovo/ideacentre_aio_3-24itl6) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Ideacentre Aio 3-24itl6 Firmware](https://www.precursorintelligence.com/product/lenovo/ideacentre_aio_3-24itl6_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [Ideacentre Aio 3-27itl6](https://www.precursorintelligence.com/product/lenovo/ideacentre_aio_3-27itl6) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Ideacentre Aio 3-27itl6 Firmware](https://www.precursorintelligence.com/product/lenovo/ideacentre_aio_3-27itl6_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [Ideacentre Creator 5-14iob6](https://www.precursorintelligence.com/product/lenovo/ideacentre_creator_5-14iob6) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Ideacentre Creator 5-14iob6 Firmware](https://www.precursorintelligence.com/product/lenovo/ideacentre_creator_5-14iob6_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [Ideacentre Gaming 5-14iob6](https://www.precursorintelligence.com/product/lenovo/ideacentre_gaming_5-14iob6) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Ideacentre Gaming 5-14iob6 Firmware](https://www.precursorintelligence.com/product/lenovo/ideacentre_gaming_5-14iob6_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [Se30](https://www.precursorintelligence.com/product/lenovo/se30) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Se30 Firmware](https://www.precursorintelligence.com/product/lenovo/se30_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [Thinkcentre M600](https://www.precursorintelligence.com/product/lenovo/thinkcentre_m600) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Thinkcentre M600 Firmware](https://www.precursorintelligence.com/product/lenovo/thinkcentre_m600_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [Thinkcentre M700 Tiny](https://www.precursorintelligence.com/product/lenovo/thinkcentre_m700_tiny) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Thinkcentre M700 Tiny Firmware](https://www.precursorintelligence.com/product/lenovo/thinkcentre_m700_tiny_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [Thinkcentre M70a](https://www.precursorintelligence.com/product/lenovo/thinkcentre_m70a) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Thinkcentre M70a Firmware](https://www.precursorintelligence.com/product/lenovo/thinkcentre_m70a_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [Thinkcentre M710e](https://www.precursorintelligence.com/product/lenovo/thinkcentre_m710e) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Thinkcentre M710e Firmware](https://www.precursorintelligence.com/product/lenovo/thinkcentre_m710e_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [Thinkcentre M710q](https://www.precursorintelligence.com/product/lenovo/thinkcentre_m710q) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- Thinkcentre M710q (10yc) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- Thinkcentre M710q (10yc) Firmware by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [Thinkcentre M710q Firmware](https://www.precursorintelligence.com/product/lenovo/thinkcentre_m710q_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [Thinkcentre M710s](https://www.precursorintelligence.com/product/lenovo/thinkcentre_m710s) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Thinkcentre M710s Firmware](https://www.precursorintelligence.com/product/lenovo/thinkcentre_m710s_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [Thinkcentre M710t](https://www.precursorintelligence.com/product/lenovo/thinkcentre_m710t) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Thinkcentre M710t Firmware](https://www.precursorintelligence.com/product/lenovo/thinkcentre_m710t_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [Thinkcentre M720e](https://www.precursorintelligence.com/product/lenovo/thinkcentre_m720e) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Thinkcentre M720e Firmware](https://www.precursorintelligence.com/product/lenovo/thinkcentre_m720e_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [Thinkcentre M75n](https://www.precursorintelligence.com/product/lenovo/thinkcentre_m75n) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Thinkcentre M75n Firmware](https://www.precursorintelligence.com/product/lenovo/thinkcentre_m75n_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [Thinkcentre M800](https://www.precursorintelligence.com/product/lenovo/thinkcentre_m800) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Thinkcentre M800 Firmware](https://www.precursorintelligence.com/product/lenovo/thinkcentre_m800_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [Thinkcentre M810z](https://www.precursorintelligence.com/product/lenovo/thinkcentre_m810z) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Thinkcentre M810z Firmware](https://www.precursorintelligence.com/product/lenovo/thinkcentre_m810z_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [Thinkcentre M820z](https://www.precursorintelligence.com/product/lenovo/thinkcentre_m820z) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Thinkcentre M820z Firmware](https://www.precursorintelligence.com/product/lenovo/thinkcentre_m820z_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [Thinkcentre M900](https://www.precursorintelligence.com/product/lenovo/thinkcentre_m900) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Thinkcentre M900 Firmware](https://www.precursorintelligence.com/product/lenovo/thinkcentre_m900_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [Thinkcentre M900x](https://www.precursorintelligence.com/product/lenovo/thinkcentre_m900x) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Thinkcentre M900x Firmware](https://www.precursorintelligence.com/product/lenovo/thinkcentre_m900x_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- Thinkcentre M90a (gen 2) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- Thinkcentre M90a (gen 2) Firmware by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [Thinkcentre M910q](https://www.precursorintelligence.com/product/lenovo/thinkcentre_m910q) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Thinkcentre M910q Firmware](https://www.precursorintelligence.com/product/lenovo/thinkcentre_m910q_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [Thinkcentre M910s](https://www.precursorintelligence.com/product/lenovo/thinkcentre_m910s) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Thinkcentre M910s Firmware](https://www.precursorintelligence.com/product/lenovo/thinkcentre_m910s_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [Thinkcentre M910t](https://www.precursorintelligence.com/product/lenovo/thinkcentre_m910t) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Thinkcentre M910t Firmware](https://www.precursorintelligence.com/product/lenovo/thinkcentre_m910t_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [Thinkcentre M910x](https://www.precursorintelligence.com/product/lenovo/thinkcentre_m910x) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Thinkcentre M910x Firmware](https://www.precursorintelligence.com/product/lenovo/thinkcentre_m910x_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [Thinkstation P310](https://www.precursorintelligence.com/product/lenovo/thinkstation_p310) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Thinkstation P310 Firmware](https://www.precursorintelligence.com/product/lenovo/thinkstation_p310_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [Thinkstation P320](https://www.precursorintelligence.com/product/lenovo/thinkstation_p320) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Thinkstation P320 Firmware](https://www.precursorintelligence.com/product/lenovo/thinkstation_p320_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [Thinkstation P320 Tiny](https://www.precursorintelligence.com/product/lenovo/thinkstation_p320_tiny) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Thinkstation P320 Tiny Firmware](https://www.precursorintelligence.com/product/lenovo/thinkstation_p320_tiny_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [V30a-22iml](https://www.precursorintelligence.com/product/lenovo/v30a-22iml) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [V30a-22iml Firmware](https://www.precursorintelligence.com/product/lenovo/v30a-22iml_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [V30a-24iml](https://www.precursorintelligence.com/product/lenovo/v30a-24iml) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [V30a-24iml Firmware](https://www.precursorintelligence.com/product/lenovo/v30a-24iml_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [V410z](https://www.precursorintelligence.com/product/lenovo/v410z) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [V410z Firmware](https://www.precursorintelligence.com/product/lenovo/v410z_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [V50t-13iob G2](https://www.precursorintelligence.com/product/lenovo/v50t-13iob_g2) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [V50t-13iob G2 Firmware](https://www.precursorintelligence.com/product/lenovo/v50t-13iob_g2_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [V520](https://www.precursorintelligence.com/product/lenovo/v520) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [V520 Firmware](https://www.precursorintelligence.com/product/lenovo/v520_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [V520s](https://www.precursorintelligence.com/product/lenovo/v520s) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [V520s Firmware](https://www.precursorintelligence.com/product/lenovo/v520s_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [V530-15icb](https://www.precursorintelligence.com/product/lenovo/v530-15icb) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [V530-15icb Firmware](https://www.precursorintelligence.com/product/lenovo/v530-15icb_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [V530-15icr](https://www.precursorintelligence.com/product/lenovo/v530-15icr) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [V530-15icr Firmware](https://www.precursorintelligence.com/product/lenovo/v530-15icr_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [V530s-07icb](https://www.precursorintelligence.com/product/lenovo/v530s-07icb) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [V530s-07icb Firmware](https://www.precursorintelligence.com/product/lenovo/v530s-07icb_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [V530s-07icr](https://www.precursorintelligence.com/product/lenovo/v530s-07icr) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [V530s-07icr Firmware](https://www.precursorintelligence.com/product/lenovo/v530s-07icr_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified
- [V540-24iwl](https://www.precursorintelligence.com/product/lenovo/v540-24iwl) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [V540-24iwl Firmware](https://www.precursorintelligence.com/product/lenovo/v540-24iwl_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): version not specified

## How do I fix CVE-2021-4211?

1. **Check whether you run it.** Compare your versions with the affected products above. Not sure what you run? Precursor Intelligence can work it out from your public website, or you can pick it from a list.
2. **Apply the vendor’s fix.** Install the update named in the vendor’s advisory. We’ve put the advisory first in the list.
3. **If you can’t patch today.** Follow any mitigation the vendor publishes, and limit who can reach the affected system from the internet until the update is in.
4. **Keep an eye on it.** Track the product and we tell you as soon as we spot this flaw on the list of exploited flaws, or a jump in its exploit likelihood.

### References

- [support.lenovo.com](https://support.lenovo.com/us/en/product_security/LEN-77639) (Vendor advisory)

## Questions

### What is CVE-2021-4211?

CVE-2021-4211 is a medium-severity flaw in A340-22icb Firmware from Lenovo, published on 22 April 2022. An attacker has to be already on the device with an administrator account, and nobody has to click anything. If it works, the attacker can read data, change data and take it offline.

### How serious is CVE-2021-4211?

It scores 6.7 out of 10 on the CVSS severity scale, which is medium. Our risk score for CVE-2021-4211 is 29 out of 100, which is Low. Its action is "Monitor". No sign of exploitation and a low forecast. Patch it in your normal update cycle.

### Is CVE-2021-4211 being exploited?

It is not on the list of flaws known to be exploited today. The latest forecast puts the chance of it being used in the next 30 days at 0.3%. That can change at any time, which is why we keep watching.

### Which versions does CVE-2021-4211 affect?

For A340-22icb Firmware from Lenovo: version not specified. The record lists 106 products in all, each with its versions, under "Who is affected" on this page.

### How do I fix CVE-2021-4211?

Install the update the vendor names in its advisory, linked first under "How do I fix" on this page. If you can't patch today, follow the vendor's mitigation and limit who can reach the affected system from the internet.

## Does CVE-2021-4211 affect you?

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