Cyber Resilience

CVE-2021-26322

High

Published: 16 November 2021

Published
16 November 2021
Modified
21 November 2024
KEV Added
—
Patch
—
CVSS Score v3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS Score 0.0040 61.1th percentile
Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-26322 is a high-severity Use of Insufficiently Random Values (CWE-330) vulnerability in Amd Epyc 7601 Firmware. Its CVSS base score is 7.5 (High).

Operationally, ranked in the top 38.9% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

Persistent platform private key may not be protected with a random IV leading to a potential “two time pad attack”.

CWE(s)
CWE-320CWE-330

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

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
+47 more product configuration(s) — see NVD for full list

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SC-12 Cryptographic Key Establishment and Management
addresses: CWE-330

Key generation under controlled management uses approved random-bit sources rather than insufficiently random values.

References