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CVE-2026-84696criticalCWE-306

Phison PS3111-S11 Controller Firmware Missing Authentication on Vendor Unique Commands

45Vexday Risk Score

No sign of exploitation. It has a public proof of concept.

ssvc Attendcvss 9.3
exploitation probability
observed exploitation
nono source reports it
2 public exploit(s)
Phison PS3111-S11 controller firmware versions through SBFQT1.3 expose privileged vendor unique commands over the ATA interface with absent or defeatable authentication mechanisms. Attackers can bypass the weak CRC-16 based unlock handshake or exploit builds with no VUC lock to read and write controller memory and raw flash, persisting implants across power cycles.
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
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.