# What is CVE-2021-33120? > CVE-2021-33120 is a medium-severity flaw (CVSS 5.4) in Atom P5942b Firmware from Intel, published on 9 February 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 0.9%. If you run an affected version, plan in the vendor’s fix. Canonical page: https://www.precursorintelligence.com/what-is/cve-2021-33120 ## 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:** 22 out of 100 (Low); action: Monitor. Kept up to date as the evidence changes. - **Severity:** Medium (CVSS 5.4 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:** 0.9% (latest exploit-likelihood forecast) - **Published:** 9 February 2022 - **Record last updated:** 5 May 2025 - **Main product:** Atom P5942b Firmware from Intel - **Affected products:** 50 ## What is CVE-2021-33120? In plain terms It can be attacked from anywhere on the internet with an ordinary user account, and nobody has to click anything. If it works, the attacker can read some data and slow it down. ### The official description Out of bounds read under complex microarchitectural condition in memory subsystem for some Intel Atom(R) Processors may allow authenticated user to potentially enable information disclosure or cause denial of service via network access. ### What kind of flaw is it? - CWE-125: Out-of-bounds Read ### How an attack on it works - Where an attacker can be: Anywhere on the internet - 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 some data and slow it down Severity vector: `CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L` ## Is CVE-2021-33120 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 0.9%. That can change at any time, which is why we keep watching. Exploit likelihood over the last 7 days: 0.9%, 0.9%, 0.9%, 0.9%, 0.9%, 0.9%, 0.9%. ### Timeline - 9 February 2022: Published - 5 May 2025: Record last updated ### How Precursor Intelligence ranks it CVE-2021-33120 scores **22 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-2021-33120? The published record lists 50 products. - [Atom P5942b Firmware](https://www.precursorintelligence.com/product/intel/atom_p5942b_firmware) by [Intel](https://www.precursorintelligence.com/vendors/intel) (Operating system): version not specified - [Atom P5921b](https://www.precursorintelligence.com/product/intel/atom_p5921b) by [Intel](https://www.precursorintelligence.com/vendors/intel) (Hardware): version not specified - [Atom P5921b Firmware](https://www.precursorintelligence.com/product/intel/atom_p5921b_firmware) by [Intel](https://www.precursorintelligence.com/vendors/intel) (Operating system): version not specified - [Atom P5931b](https://www.precursorintelligence.com/product/intel/atom_p5931b) by [Intel](https://www.precursorintelligence.com/vendors/intel) (Hardware): version not specified - [Atom P5931b Firmware](https://www.precursorintelligence.com/product/intel/atom_p5931b_firmware) by [Intel](https://www.precursorintelligence.com/vendors/intel) (Operating system): version not specified - [Atom P5942b](https://www.precursorintelligence.com/product/intel/atom_p5942b) by [Intel](https://www.precursorintelligence.com/vendors/intel) (Hardware): version not specified - [Atom P5962b](https://www.precursorintelligence.com/product/intel/atom_p5962b) by [Intel](https://www.precursorintelligence.com/vendors/intel) (Hardware): version not specified - [Atom P5962b Firmware](https://www.precursorintelligence.com/product/intel/atom_p5962b_firmware) by [Intel](https://www.precursorintelligence.com/vendors/intel) (Operating system): version not specified - [Atom X6200fe](https://www.precursorintelligence.com/product/intel/atom_x6200fe) by [Intel](https://www.precursorintelligence.com/vendors/intel) (Hardware): version not specified - [Atom X6200fe Firmware](https://www.precursorintelligence.com/product/intel/atom_x6200fe_firmware) by [Intel](https://www.precursorintelligence.com/vendors/intel) (Operating system): version not specified - [Atom X6211e](https://www.precursorintelligence.com/product/intel/atom_x6211e) by [Intel](https://www.precursorintelligence.com/vendors/intel) (Hardware): version not specified - [Atom X6211e Firmware](https://www.precursorintelligence.com/product/intel/atom_x6211e_firmware) by [Intel](https://www.precursorintelligence.com/vendors/intel) (Operating system): version not specified - [Atom X6212re](https://www.precursorintelligence.com/product/intel/atom_x6212re) by [Intel](https://www.precursorintelligence.com/vendors/intel) (Hardware): version not specified - [Atom X6212re Firmware](https://www.precursorintelligence.com/product/intel/atom_x6212re_firmware) by [Intel](https://www.precursorintelligence.com/vendors/intel) (Operating system): version not specified - [Atom X6413e](https://www.precursorintelligence.com/product/intel/atom_x6413e) by [Intel](https://www.precursorintelligence.com/vendors/intel) (Hardware): version not specified - [Atom X6413e Firmware](https://www.precursorintelligence.com/product/intel/atom_x6413e_firmware) by [Intel](https://www.precursorintelligence.com/vendors/intel) (Operating system): version not specified - [Atom X6425e](https://www.precursorintelligence.com/product/intel/atom_x6425e) by [Intel](https://www.precursorintelligence.com/vendors/intel) (Hardware): version not specified - [Atom X6425e Firmware](https://www.precursorintelligence.com/product/intel/atom_x6425e_firmware) by [Intel](https://www.precursorintelligence.com/vendors/intel) (Operating system): version not specified - [Atom X6425re](https://www.precursorintelligence.com/product/intel/atom_x6425re) by [Intel](https://www.precursorintelligence.com/vendors/intel) (Hardware): version not specified - [Atom X6425re Firmware](https://www.precursorintelligence.com/product/intel/atom_x6425re_firmware) by [Intel](https://www.precursorintelligence.com/vendors/intel) (Operating system): version not specified - [Atom X6427fe](https://www.precursorintelligence.com/product/intel/atom_x6427fe) by [Intel](https://www.precursorintelligence.com/vendors/intel) (Hardware): version not specified - [Atom X6427fe Firmware](https://www.precursorintelligence.com/product/intel/atom_x6427fe_firmware) by [Intel](https://www.precursorintelligence.com/vendors/intel) (Operating system): version not specified - [Celeron J6413](https://www.precursorintelligence.com/product/intel/celeron_j6413) by [Intel](https://www.precursorintelligence.com/vendors/intel) (Hardware): version not specified - [Celeron J6413 Firmware](https://www.precursorintelligence.com/product/intel/celeron_j6413_firmware) by [Intel](https://www.precursorintelligence.com/vendors/intel) (Operating system): version not specified - [Celeron N4500](https://www.precursorintelligence.com/product/intel/celeron_n4500) by [Intel](https://www.precursorintelligence.com/vendors/intel) (Hardware): version not specified - [Celeron N4500 Firmware](https://www.precursorintelligence.com/product/intel/celeron_n4500_firmware) by [Intel](https://www.precursorintelligence.com/vendors/intel) (Operating system): version not specified - [Celeron N4505](https://www.precursorintelligence.com/product/intel/celeron_n4505) by [Intel](https://www.precursorintelligence.com/vendors/intel) (Hardware): version not specified - [Celeron N4505 Firmware](https://www.precursorintelligence.com/product/intel/celeron_n4505_firmware) by [Intel](https://www.precursorintelligence.com/vendors/intel) (Operating system): version not specified - [Celeron N5100](https://www.precursorintelligence.com/product/intel/celeron_n5100) by [Intel](https://www.precursorintelligence.com/vendors/intel) (Hardware): version not specified - [Celeron N5100 Firmware](https://www.precursorintelligence.com/product/intel/celeron_n5100_firmware) by [Intel](https://www.precursorintelligence.com/vendors/intel) (Operating system): version not specified - [Celeron N5105](https://www.precursorintelligence.com/product/intel/celeron_n5105) by [Intel](https://www.precursorintelligence.com/vendors/intel) (Hardware): version not specified - [Celeron N5105 Firmware](https://www.precursorintelligence.com/product/intel/celeron_n5105_firmware) by [Intel](https://www.precursorintelligence.com/vendors/intel) (Operating system): version not specified - [Celeron N6211](https://www.precursorintelligence.com/product/intel/celeron_n6211) by [Intel](https://www.precursorintelligence.com/vendors/intel) (Hardware): version not specified - [Celeron N6211 Firmware](https://www.precursorintelligence.com/product/intel/celeron_n6211_firmware) by [Intel](https://www.precursorintelligence.com/vendors/intel) (Operating system): version not specified - [Core I3-L13g4](https://www.precursorintelligence.com/product/intel/core_i3-l13g4) by [Intel](https://www.precursorintelligence.com/vendors/intel) (Hardware): version not specified - [Core I3-L13g4 Firmware](https://www.precursorintelligence.com/product/intel/core_i3-l13g4_firmware) by [Intel](https://www.precursorintelligence.com/vendors/intel) (Operating system): version not specified - [Core I5-L16g7](https://www.precursorintelligence.com/product/intel/core_i5-l16g7) by [Intel](https://www.precursorintelligence.com/vendors/intel) (Hardware): version not specified - [Core I5-L16g7 Firmware](https://www.precursorintelligence.com/product/intel/core_i5-l16g7_firmware) by [Intel](https://www.precursorintelligence.com/vendors/intel) (Operating system): version not specified - [Pentium J6425](https://www.precursorintelligence.com/product/intel/pentium_j6425) by [Intel](https://www.precursorintelligence.com/vendors/intel) (Hardware): version not specified - [Pentium J6425 Firmware](https://www.precursorintelligence.com/product/intel/pentium_j6425_firmware) by [Intel](https://www.precursorintelligence.com/vendors/intel) (Operating system): version not specified - [Pentium N6415](https://www.precursorintelligence.com/product/intel/pentium_n6415) by [Intel](https://www.precursorintelligence.com/vendors/intel) (Hardware): version not specified - [Pentium N6415 Firmware](https://www.precursorintelligence.com/product/intel/pentium_n6415_firmware) by [Intel](https://www.precursorintelligence.com/vendors/intel) (Operating system): version not specified - [Pentium Silver N6000](https://www.precursorintelligence.com/product/intel/pentium_silver_n6000) by [Intel](https://www.precursorintelligence.com/vendors/intel) (Hardware): version not specified - [Pentium Silver N6000 Firmware](https://www.precursorintelligence.com/product/intel/pentium_silver_n6000_firmware) by [Intel](https://www.precursorintelligence.com/vendors/intel) (Operating system): version not specified - [Pentium Silver N6005](https://www.precursorintelligence.com/product/intel/pentium_silver_n6005) by [Intel](https://www.precursorintelligence.com/vendors/intel) (Hardware): version not specified - [Pentium Silver N6005 Firmware](https://www.precursorintelligence.com/product/intel/pentium_silver_n6005_firmware) by [Intel](https://www.precursorintelligence.com/vendors/intel) (Operating system): version not specified - [Xeon D1700](https://www.precursorintelligence.com/product/intel/xeon_d1700) by [Intel](https://www.precursorintelligence.com/vendors/intel) (Hardware): version not specified - [Xeon D1700 Firmware](https://www.precursorintelligence.com/product/intel/xeon_d1700_firmware) by [Intel](https://www.precursorintelligence.com/vendors/intel) (Operating system): version not specified - [Xeon D2700](https://www.precursorintelligence.com/product/intel/xeon_d2700) by [Intel](https://www.precursorintelligence.com/vendors/intel) (Hardware): version not specified - [Xeon D2700 Firmware](https://www.precursorintelligence.com/product/intel/xeon_d2700_firmware) by [Intel](https://www.precursorintelligence.com/vendors/intel) (Operating system): version not specified ## How do I fix CVE-2021-33120? 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 - [intel.com](https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00589.html) (Mitigation, Vendor advisory) ## Questions ### What is CVE-2021-33120? CVE-2021-33120 is a medium-severity flaw in Atom P5942b Firmware from Intel, published on 9 February 2022. It can be attacked from anywhere on the internet with an ordinary user account, and nobody has to click anything. If it works, the attacker can read some data and slow it down. ### How serious is CVE-2021-33120? It scores 5.4 out of 10 on the CVSS severity scale, which is medium. Our risk score for CVE-2021-33120 is 22 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-2021-33120 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 0.9%. That can change at any time, which is why we keep watching. ### Which versions does CVE-2021-33120 affect? For Atom P5942b Firmware from Intel: version not specified. The record lists 50 products in all, each with its versions, under "Who is affected" on this page. ### How do I fix CVE-2021-33120? 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-2021-33120 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. Start free (no card, nothing to install): https://www.precursorintelligence.com/register Book a demo: https://www.precursorintelligence.com/contact