CVE-2026-82876 — Phison PS3111-S11 Controller Firmware Signature Verification Bypass
Phison PS3111-S11 controller firmware verifies RSA signatures using a public modulus embedded within the firmware image itself rather than anchored in immutable storage. Attacke…
Published: 2026-08-31 · CVSS: 9.3 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7