CVE-2021-21554
What it is
Dell PowerEdge R640, R740, R740XD, R840, R940, R940xa, MX740c, MX840c, and, Dell Precision 7920 Rack Workstation BIOS contain a stack-based buffer overflow vulnerability in systems with Intel Optane DC Persistent Memory installed. A local malicious user with high privileges may potentially exploit this vulnerability, leading to a denial of Service, arbitrary code execution, or information disclosure in UEFI or BIOS Preboot Environment.
At a glance
- Exploitability
- Can be exploited locally on the machine with an admin-level account, but needs a user to act. High risk of data exposure, data tampering.
- Exploit odds
- 0.3% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 0.3% in the next 30 days (EPSS).
- Severity: 6.1 MEDIUM (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 0.3% · EPSS, next 30 days
- Weakness
- CWE-122
- Record status
- Modified
Affected
- Dell Poweredge r640 Firmware < 2.9.4
- Dell Poweredge r740 Firmware < 2.9.4
- Dell Poweredge r740xd Firmware < 2.9.4
- Dell Poweredge r940 Firmware < 2.9.4
- Dell Poweredge r840 Firmware < 2.9.4
- Dell Poweredge r940xa Firmware < 2.9.4
- Dell Poweredge mx740c Firmware < 2.9.4
- Dell Poweredge mx840c Firmware < 2.9.4
Attack profile CVSS 3.1 · 6.1
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- High
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- Low
Raw vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:L
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2021-21554.md and follow it. Check whether this project is affected by CVE-2021-21554. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
