# What is CVE-2020-8333?

> CVE-2020-8333 is a high-severity flaw (CVSS 7.8) in 63 Firmware from Lenovo, published on 24 September 2020. 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-2020-8333

## 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:** 46 out of 100 (Medium); action: Plan remediation. Kept up to date as the evidence changes.
- **Severity:** High (CVSS 7.8 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:** 24 September 2020
- **Record last updated:** 7 October 2020
- **Main product:** 63 Firmware from Lenovo
- **Affected products:** 54

## What is CVE-2020-8333? In plain terms

An attacker has to be already on the device with an ordinary user 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 EEPROM driver in some Lenovo Desktops and ThinkStation models may allow arbitrary code execution

### What kind of flaw is it?

- Unknown: Unknown

### 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 ordinary user 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:L/UI:N/S:U/C:H/I:H/A:H`

## Is CVE-2020-8333 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

- 24 September 2020: Published
- 7 October 2020: Record last updated

### How Precursor Intelligence ranks it

CVE-2020-8333 scores **46 out of 100 (Medium)**, with the action "Plan remediation".

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-2020-8333?

The published record lists 54 products. Versions are as published: "before fckt98a" means every version up to, but not including, fckt98a.

- [63 Firmware](https://www.precursorintelligence.com/product/lenovo/63_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): before fckt98a
- [63](https://www.precursorintelligence.com/product/lenovo/63) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [H50-30g](https://www.precursorintelligence.com/product/lenovo/h50-30g) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [H50-30g Firmware](https://www.precursorintelligence.com/product/lenovo/h50-30g_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): before fckt98a
- [M4500](https://www.precursorintelligence.com/product/lenovo/m4500) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [M4500 Firmware](https://www.precursorintelligence.com/product/lenovo/m4500_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): before fckt98a
- [M4550](https://www.precursorintelligence.com/product/lenovo/m4550) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [M4550 Firmware](https://www.precursorintelligence.com/product/lenovo/m4550_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): before fckt98a
- [Qitian 4500](https://www.precursorintelligence.com/product/lenovo/qitian_4500) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Qitian 4500 Firmware](https://www.precursorintelligence.com/product/lenovo/qitian_4500_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): before fckt98a
- [Qitian B4550](https://www.precursorintelligence.com/product/lenovo/qitian_b4550) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Qitian B4550 Firmware](https://www.precursorintelligence.com/product/lenovo/qitian_b4550_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): before fckt98a
- [Qitian M4550](https://www.precursorintelligence.com/product/lenovo/qitian_m4550) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Qitian M4550 Firmware](https://www.precursorintelligence.com/product/lenovo/qitian_m4550_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): before fckt98a
- [Thinkcentre E73](https://www.precursorintelligence.com/product/lenovo/thinkcentre_e73) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Thinkcentre E73 Firmware](https://www.precursorintelligence.com/product/lenovo/thinkcentre_e73_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): before fckt98a
- [Thinkcentre E73s](https://www.precursorintelligence.com/product/lenovo/thinkcentre_e73s) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Thinkcentre E73s Firmware](https://www.precursorintelligence.com/product/lenovo/thinkcentre_e73s_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): before fckt98a
- [Thinkcentre E93](https://www.precursorintelligence.com/product/lenovo/thinkcentre_e93) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Thinkcentre E93 Firmware](https://www.precursorintelligence.com/product/lenovo/thinkcentre_e93_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): before fbktdea
- [Thinkcentre M4500k](https://www.precursorintelligence.com/product/lenovo/thinkcentre_m4500k) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Thinkcentre M4500k Firmware](https://www.precursorintelligence.com/product/lenovo/thinkcentre_m4500k_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): before fckt98a
- [Thinkcentre M4500q](https://www.precursorintelligence.com/product/lenovo/thinkcentre_m4500q) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Thinkcentre M4500q Firmware](https://www.precursorintelligence.com/product/lenovo/thinkcentre_m4500q_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): before fhkt85a
- [Thinkcentre M4500s](https://www.precursorintelligence.com/product/lenovo/thinkcentre_m4500s) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Thinkcentre M4500s Firmware](https://www.precursorintelligence.com/product/lenovo/thinkcentre_m4500s_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): before fckt98a
- [Thinkcentre M4500t](https://www.precursorintelligence.com/product/lenovo/thinkcentre_m4500t) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Thinkcentre M4500t Firmware](https://www.precursorintelligence.com/product/lenovo/thinkcentre_m4500t_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): before fckt98a
- [Thinkcentre M9350z](https://www.precursorintelligence.com/product/lenovo/thinkcentre_m9350z) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Thinkcentre M9350z Firmware](https://www.precursorintelligence.com/product/lenovo/thinkcentre_m9350z_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): before fekta2a
- [Thinkcentre M93z](https://www.precursorintelligence.com/product/lenovo/thinkcentre_m93z) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Thinkcentre M93z Firmware](https://www.precursorintelligence.com/product/lenovo/thinkcentre_m93z_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): before fekta2a
- [Thinkstation C30](https://www.precursorintelligence.com/product/lenovo/thinkstation_c30) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Thinkstation C30 Firmware](https://www.precursorintelligence.com/product/lenovo/thinkstation_c30_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): before a3kt70a
- [Thinkstation D30](https://www.precursorintelligence.com/product/lenovo/thinkstation_d30) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Thinkstation D30 Firmware](https://www.precursorintelligence.com/product/lenovo/thinkstation_d30_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): before a3kt70a
- [Thinkstation E32](https://www.precursorintelligence.com/product/lenovo/thinkstation_e32) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Thinkstation E32 Firmware](https://www.precursorintelligence.com/product/lenovo/thinkstation_e32_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): before fbktdea
- [Thinkstation P300](https://www.precursorintelligence.com/product/lenovo/thinkstation_p300) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Thinkstation P300 Firmware](https://www.precursorintelligence.com/product/lenovo/thinkstation_p300_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): before a2kt70a
- [Thinkstation S30](https://www.precursorintelligence.com/product/lenovo/thinkstation_s30) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Thinkstation S30 Firmware](https://www.precursorintelligence.com/product/lenovo/thinkstation_s30_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): before a2kt70a
- [Yangtian Afh81](https://www.precursorintelligence.com/product/lenovo/yangtian_afh81) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Yangtian Afh81 Firmware](https://www.precursorintelligence.com/product/lenovo/yangtian_afh81_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): before fckt98a
- [Yangtian Mc H81](https://www.precursorintelligence.com/product/lenovo/yangtian_mc_h81) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Yangtian Mc H81 Firmware](https://www.precursorintelligence.com/product/lenovo/yangtian_mc_h81_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): before fckt98a
- [Yangtian Mf H81 Pci](https://www.precursorintelligence.com/product/lenovo/yangtian_mf_h81_pci) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Yangtian Mf H81 Pci Firmware](https://www.precursorintelligence.com/product/lenovo/yangtian_mf_h81_pci_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): before fckt98a
- [Yangtian Tc H81 Pci](https://www.precursorintelligence.com/product/lenovo/yangtian_tc_h81_pci) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Yangtian Tc H81 Pci Firmware](https://www.precursorintelligence.com/product/lenovo/yangtian_tc_h81_pci_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): before fckt98a
- [Yangtian Wcc H81 Pci](https://www.precursorintelligence.com/product/lenovo/yangtian_wcc_h81_pci) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Yangtian Wcc H81 Pci Firmware](https://www.precursorintelligence.com/product/lenovo/yangtian_wcc_h81_pci_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): before fckt98a
- [Yangtian Wf H81 Pci](https://www.precursorintelligence.com/product/lenovo/yangtian_wf_h81_pci) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Hardware): version not specified
- [Yangtian Wf H81 Pci Firmware](https://www.precursorintelligence.com/product/lenovo/yangtian_wf_h81_pci_firmware) by [Lenovo](https://www.precursorintelligence.com/vendors/lenovo) (Operating system): before fckt98a

## How do I fix CVE-2020-8333?

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-30042) (Patch, Vendor advisory)

## Questions

### What is CVE-2020-8333?

CVE-2020-8333 is a high-severity flaw in 63 Firmware from Lenovo, published on 24 September 2020. An attacker has to be already on the device with an ordinary user 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-2020-8333?

It scores 7.8 out of 10 on the CVSS severity scale, which is high. Our risk score for CVE-2020-8333 is 46 out of 100, which is Medium. Its action is "Plan remediation". No sign of exploitation and a low forecast. Patch it in your normal update cycle.

### Is CVE-2020-8333 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-2020-8333 affect?

For 63 Firmware from Lenovo: before fckt98a. The record lists 54 products in all, each with its versions, under "Who is affected" on this page.

### How do I fix CVE-2020-8333?

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-2020-8333 affect you?

Precursor Intelligence keeps checking for you:

- **Tell us what you run.** Pick your software from a list, or let us work it out from your website.
- **We match it to every flaw.** Over 400,000 published flaws, checked against your list.
- **Ranked by real-world risk.** Every flaw gets a 0 to 100 risk score, kept up to date, led by evidence criminals are using it.
- **Told as soon as we know.** An alert by email, in the app or by webhook to your own tools.

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