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VULNERABILITIES

CVE-2026-82876 Details

Description

Phison PS3111-S11 controller firmware verifies RSA signatures using a public modulus embedded within the firmware image itself rather than anchored in immutable storage. Attackers can generate arbitrary RSA key pairs, sign modified firmware with the private key, embed the matching modulus in the signature segment, and the controller accepts the tampered firmware as valid.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:8.2 HIGHVector:CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/trulycrisp/psychite [email protected]
https://trulycrisp.github.io/drivefirmware/phison_s11/ [email protected]
https://www.vulncheck.com/advisories/phison-ps3111-s11-controller-firmware-signature-verification-bypass [email protected]

Weakness Enumeration

CWE-IDCWE NameSource
CWE-347Improper Verification of Cryptographic Signature[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-82876
NVD Published Date:
Aug 31, 2026
NVD Last Modified:
Sep 10, 2026
Source:
[email protected]
CVE-2026-82876 Details - Not Deferred