CVE-2021-26321
MEDIUMCVSS 5.5/10EPSS 0.24%
Last modified
CVE-2021-26321 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. Insufficient ID command validation in the SEV Firmware may allow a local authenticated attacker to perform a denial of service of the PSP.. EPSS estimates a 0.24% chance of exploitation in the next 30 days.
Description
Insufficient ID command validation in the SEV Firmware may allow a local authenticated attacker to perform a denial of service of the PSP.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Amd | Epyc 7601 Firmware | < naplespi-sp3_1.0.0.g |
| Amd | Epyc 7551p Firmware | < naplespi-sp3_1.0.0.g |
| Amd | Epyc 7551 Firmware | < naplespi-sp3_1.0.0.g |
| Amd | Epyc 7501 Firmware | < naplespi-sp3_1.0.0.g |
| Amd | Epyc 7451 Firmware | < naplespi-sp3_1.0.0.g |
| Amd | Epyc 7401 Firmware | < naplespi-sp3_1.0.0.g |
| Amd | Epyc 7371 Firmware | < naplespi-sp3_1.0.0.g |
| Amd | Epyc 7351p Firmware | < naplespi-sp3_1.0.0.g |
| Amd | Epyc 7351 Firmware | < naplespi-sp3_1.0.0.g |
| Amd | Epyc 7301 Firmware | < naplespi-sp3_1.0.0.g |
| Amd | Epyc 7281 Firmware | < naplespi-sp3_1.0.0.g |
| Amd | Epyc 7261 Firmware | < naplespi-sp3_1.0.0.g |
| Amd | Epyc 7251 Firmware | < naplespi-sp3_1.0.0.g |
| Amd | Epyc 7f72 Firmware | < romepi-sp3_1.0.0.c |
| Amd | Epyc 7f52 Firmware | < romepi-sp3_1.0.0.c |
| Amd | Epyc 7f32 Firmware | < romepi-sp3_1.0.0.c |
| Amd | Epyc 7h12 Firmware | < romepi-sp3_1.0.0.c |
| Amd | Epyc 7742 Firmware | < romepi-sp3_1.0.0.c |
| Amd | Epyc 7702 Firmware | < romepi-sp3_1.0.0.c |
| Amd | Epyc 7702p Firmware | < romepi-sp3_1.0.0.c |
| Amd | Epyc 7662 Firmware | < romepi-sp3_1.0.0.c |
| Amd | Epyc 7642 Firmware | < romepi-sp3_1.0.0.c |
| Amd | Epyc 7552 Firmware | < romepi-sp3_1.0.0.c |
| Amd | Epyc 7542 Firmware | < romepi-sp3_1.0.0.c |
| Amd | Epyc 7532 Firmware | < romepi-sp3_1.0.0.c |
| Amd | Epyc 7502 Firmware | < romepi-sp3_1.0.0.c |
| Amd | Epyc 7502p Firmware | < romepi-sp3_1.0.0.c |
| Amd | Epyc 7452 Firmware | < romepi-sp3_1.0.0.c |
| Amd | Epyc 7402 Firmware | < romepi-sp3_1.0.0.c |
| Amd | Epyc 7402p Firmware | < romepi-sp3_1.0.0.c |
| Amd | Epyc 7352 Firmware | < romepi-sp3_1.0.0.c |
| Amd | Epyc 7302 Firmware | < romepi-sp3_1.0.0.c |
| Amd | Epyc 7302p Firmware | < romepi-sp3_1.0.0.c |
| Amd | Epyc 7282 Firmware | < romepi-sp3_1.0.0.c |
| Amd | Epyc 7272 Firmware | < romepi-sp3_1.0.0.c |
| Amd | Epyc 7262 Firmware | < romepi-sp3_1.0.0.c |
| Amd | Epyc 7252 Firmware | < romepi-sp3_1.0.0.c |
| Amd | Epyc 7232p Firmware | < romepi-sp3_1.0.0.c |
| Amd | Epyc 7763 Firmware | < milanpi-sp3_1.0.0.4 |
| Amd | Epyc 7713p Firmware | < milanpi-sp3_1.0.0.4 |
| Amd | Epyc 7713 Firmware | < milanpi-sp3_1.0.0.4 |
| Amd | Epyc 7663 Firmware | < milanpi-sp3_1.0.0.4 |
| Amd | Epyc 7643 Firmware | < milanpi-sp3_1.0.0.4 |
| Amd | Epyc 75f3 Firmware | < milanpi-sp3_1.0.0.4 |
| Amd | Epyc 7543p Firmware | < milanpi-sp3_1.0.0.4 |
| Amd | Epyc 7543 Firmware | < milanpi-sp3_1.0.0.4 |
| Amd | Epyc 7513 Firmware | < milanpi-sp3_1.0.0.4 |
| Amd | Epyc 7453 Firmware | < milanpi-sp3_1.0.0.4 |
| Amd | Epyc 74f3 Firmware | < milanpi-sp3_1.0.0.4 |
| Amd | Epyc 7443p Firmware | < milanpi-sp3_1.0.0.4 |
Showing 50 of 57 affected configurations. See NVD for the full list.
References
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-26321?
Insufficient ID command validation in the SEV Firmware may allow a local authenticated attacker to perform a denial of service of the PSP.
How severe is CVE-2021-26321?
CVE-2021-26321 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.24% probability of exploitation in the next 30 days.
How do I fix CVE-2021-26321?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-26321?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST