Cyber Resilience

CVE-2021-26354

Medium

Published: 09 May 2023

Published
09 May 2023
Modified
28 January 2025
KEV Added
—
Patch
—
CVSS Score v3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
EPSS Score 0.0012 31.2th percentile
Risk Priority 11 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-26354 is a medium-severity Classic Buffer Overflow (CWE-120) vulnerability in Amd Epyc 7773X Firmware. Its CVSS base score is 5.5 (Medium).

Operationally, ranked at the 31.2th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

Insufficient bounds checking in ASP may allow an attacker to issue a system call from a compromised ABL which may cause arbitrary memory values to be initialized to zero, potentially leading to a loss of integrity.

CWE(s)
CWE-120

Related Threats

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

Affected Assets

amd
epyc 7773x firmware
≤ milanpi_1.0.0.6
amd
epyc 7763 firmware
≤ milanpi_1.0.0.6
amd
epyc 7713p firmware
≤ milanpi_1.0.0.6
amd
epyc 7713 firmware
≤ milanpi_1.0.0.6
amd
epyc 7663 firmware
≤ milanpi_1.0.0.6
amd
epyc 7643 firmware
≤ milanpi_1.0.0.6
amd
epyc 75f3 firmware
≤ milanpi_1.0.0.6
amd
epyc 7573x firmware
≤ milanpi_1.0.0.6
amd
epyc 7543p firmware
≤ milanpi_1.0.0.6
amd
epyc 7543 firmware
≤ milanpi_1.0.0.6
+142 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-27 Platform-independent Applications
addresses: CWE-120

Platform-independent managed code eliminates the need for unchecked native buffer copies that are the root cause of classic buffer overflows.

References