CVE-2026-6776
HIGH severity · CVSS 7.8 · Memory corruption
7.8CVSS HIGH
Summary
Incorrect boundary conditions in the WebRTC: Networking component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Impact & exploitability
Attack vectorLocal
Attack complexityLow
Privileges requiredNone
User interactionRequired
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)0%
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Affected products we track (2)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Additional information
- NVD record
- https://www.mozilla.org/security/advisories/mfsa2026-30/Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-32/Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-33/Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-34/Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=2021770