Auth bypass in Phison Electronics Corporation Ps3111-S11 Controller Firmware
CVE-2026-84696
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.
Vulnerability class: Broken Authentication
CVSS v3 metric
CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H.
Affected products
- Phison Electronics Corporation Ps3111-s11 Controller Firmware — versions SBFQT1.3
Weakness classification (CWE)
References
- disclosure@vulncheck.com (exploit)
- disclosure@vulncheck.com (exploit)
- disclosure@vulncheck.com (technical-description)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-84696?
- CVE-2026-84696 is a high-severity vulnerability in Phison Electronics Corporation Ps3111-S11 Controller Firmware, classified under Missing Authentication for Critical Function. CVSS score: 8.2/10. Published 2026-09-02.
- How severe is CVE-2026-84696?
- High severity. CVSS v3 base score is 8.2 out of 10.