CVE-2026-82876: critical vulnerability in Phison Electronics Corporation PS3111-S11…
Phison PS3111-S11 Controller Firmware Signature Verification Bypass
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
48Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 9.3epss 0.1%
from disclosure to weapon4 days
Published on NVDAug 31
1st PoC+4d
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.
CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Affected products
Phison Electronics Corporation · PS3111-S11 Controller Firmwarepublic PoCs found — 2
githubgithub.com/Hunt-Benito/the-key-ships-with-the-lock-cve-2026-82876-phison-s11-ssd-firmware-signature-bypass★ 0cve_referencegithub.com/trulycrisp/psychiteunverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — Phison Electronics Corporation PS3111-S11…
In the same product, most dangerous first.