CVE-2026-84696

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

Published Sep 2, 2026 CVSS 4.0 · 9.3 Critical EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Phison Electronics Corporation
Phison Electronics Corporation ps3111-s11 Controller Firmware
Vendors & Products Phison Electronics Corporation
Phison Electronics Corporation ps3111-s11 Controller Firmware
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description 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.
Title Phison PS3111-S11 Controller Firmware Missing Authentication on Vendor Unique Commands
Weaknesses CWE-306
References
Metrics cvssV3_1

{'score': 8.2, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H'}

cvssV4_0

{'score': 9.3, 'vector': '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Sep 2, 2026, 1:03 PM
Reserved
Sep 1, 2026, 11:24 PM
Status
Awaiting Analysis
Published
Sep 2, 2026, 1:17 AM
Modified
Sep 10, 2026, 3:47 PM