CVE-2026-82876
High
Description
Phison PS3111-S11 controller firmware verifies RSA signatures using a public modulus embedded within the firmware image itself rather than anchored in immutable storage. Attackers can generate arbitrary RSA key pairs, sign modified firmware with the private key, embed the matching modulus in the signature segment, and the controller accepts the tampered firmware as valid.
SeverityHigh
CVSS8.2
Exploit probability—
ProductPS3111-S11 Controller Firmware
PublishedAug 31, 2026
First seenAug 31, 2026
Weakness typeCWE-347CWE-347
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Phison Electronics Corporation PS3111-S11 Controller Firmware | SBFQT1.3 | — |
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