CVE-2026-84696 Phison PS3111-S11 Controller Firmware Missing Authentication on Vendor Unique Commands
Attackers can bypass weak authentication to execute privileged commands, read/write flash memory, and persist implants on Phison SSD controllers.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-84696?
CVE-2026-84696 is a critical missing authorization vulnerability in Phison Electronics Corporation PS3111-S11 Controller Firmware, published on 2 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-306
Which versions are affected by CVE-2026-84696?
How do I fix CVE-2026-84696?
No fix has been published for CVE-2026-84696 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-84696 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-84696 exists.
Sources
Also known as GHSA-p44m-vhp2-rrrf.