CVE-2026-2757

CriticalCVSS 9.8

Published: 24/02/2026(UTC)Updated: 15/07/2026(UTC)Translated: 16/07/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.49%

39th percentile - higher than 39% of all known CVEs

Summary

A vulnerability in the WebRTC: Audio/Video component of Firefox and Thunderbird due to incorrect boundary conditions. The flaw is fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.

Risk Assessment

An attacker could exploit this vulnerability to execute arbitrary code or cause a denial of service, compromising system confidentiality and availability.

Recommendation

Immediately update Firefox and Thunderbird to the patched versions: Firefox 148, ESR 115.33/140.8, Thunderbird 148/140.8.

Original NVD description (English source)

Incorrect boundary conditions in the WebRTC: Audio/Video component. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.