CVE-2026-82876
Last modified
CVE-2026-82876 is a high-severity vulnerability rated 8.2/10 on the CVSS scale. 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.. EPSS estimates a 0.09% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Phison Electronics Corporation | PS3111-S11 Controller Firmware | SBFQT1.3 |
References
Timeline
- Published
- Last Modified
- Status
- Received
Frequently Asked Questions
What is CVE-2026-82876?
How severe is CVE-2026-82876?
How do I fix CVE-2026-82876?
How Strix Helps
- Same Subject, Wrong User: A Cross-Issuer Account Takeover in n8nStrix found an identity-binding bug in n8n's token-exchange flow enabling account takeover.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-82870ToolJet before v3.16.208 fails to validate organizationId ow…9.6
- CVE-2026-82871ToolJet before v3.16.208 fails to validate organization memb…7.7
- CVE-2026-82872ToolJet before v3.16.208 fails to validate that the path org…9.1
- CVE-2026-82873ToolJet through 3.0.0-ee-beta.2 contains authorization bypas…5
- CVE-2026-82874ToolJet before v3.16.208 fails to validate that authenticate…9.9
- CVE-2026-82875ToolJet before v3.16.208 contains an authorization bypass vu…5.5
- CVE-2026-82877ILIAS before versions 9.22, 10.10, and 11.3 contains an arbi…6.5
- CVE-2026-82878DataEase versions before 2.10.26 omit object-level authoriza…6.3
- CVE-2026-82879DataEase before 2.10.26 contains multiple access control def…6.3
- CVE-2026-8288A vulnerability was determined in Open5GS up to 2.7.7. This …6.5
- CVE-2026-82880YaCy Search Server through 1.941 contains an XML external en…7.5
- CVE-2026-82881Aix-DB through 1.2.4 renders markdown with raw HTML enabled …5.4
Are you affected by CVE-2026-82876?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST