VULNERABILITY INTELLIGENCE

CVE-2026-2777

CVSS score9.8 CRITICAL
EPSS probability0.44%
CISA KEVNot currently listed
Published2026-02-24
Last modified2026-07-15
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Description

Privilege escalation in the Messaging System component. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.

Weakness classification

  • CWE-269: Improper Privilege Management

Primary references