VULNERABILITY INTELLIGENCE
CVE-2026-82876
CVSS score8.2 HIGH
EPSS probability0.12%
CISA KEVNot currently listed
Published2026-08-31
Last modified2026-09-10
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
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.
Weakness classification
- disclosure@vulncheck.com: CWE-347