CVE-2021-26335

Improper input and range checking in the Platform Security Processor (PSP) boot loader image...

7.8 High

Improper input and range checking in the AMD Secure Processor (ASP) boot loader image header may allow an attacker to use attacker-controlled values prior to signature validation potentially resulting in arbitrary code execution.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

0.29%Down 0.4 points since Nov 17, 2021

What each source reports

NVD Score used 7.8

Record: CVE-2021-26335
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 7.2 HighAV:L/AC:L/Au:N/C:C/I:C/A:C
Updated: 2026-11-02

CVE List No score

Record: CVE-2021-26335
Updated: 2026-11-02

EUVDEUVD-2021-13141 No score

Record: EUVD-2021-13141
Updated: 2026-11-03

GitHub AdvisoriesGHSA-gr7m-fgfp-5fgc 7.8

Improper input and range checking in the Platform Security Processor (PSP) boot loader image...

Improper input and range checking in the Platform Security Processor (PSP) boot loader image header may allow for an attacker to use attack-controlled values prior to signature validation potentially resulting in arbitrary code execution.

Record: GHSA-gr7m-fgfp-5fgc
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

Affected products

Show 48 moreShow less

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases, published	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-26335 is a high vulnerability (CVSS 7.8) in Amd Athlon™ Series, published November 16, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.29%, the 22nd percentile. No source names a fixed version.