CVE-2026-84696
Phison PS3111-S11 Controller Firmware Missing Authentication on Vendor Unique Commands
CVSS Score
8.2
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-306 |
| Vendor | phison electronics corporation |
| Product | ps3111-s11 controller firmware |
| Published | Sep 2, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H Attack Vector
Local
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
Phison Electronics Corporation / PS3111-S11 Controller Firmware
SBFQT1.3
References
trulycrisp.github.io: https://trulycrisp.github.io/drivefirmware/phison_s11/ github.com: https://github.com/trulycrisp/psychite github.com: https://github.com/trulycrisp/disksec vulncheck.com: https://www.vulncheck.com/advisories/phison-ps3111-s11-controller-firmware-missing-authentication-on-vendor-unique-commands
Credits
Michael Herbert