VULNERABILITY INTELLIGENCE

CVE-2025-11721

CVSS score9.8 CRITICAL
EPSS probability0.36%
CISA KEVNot currently listed
Published2025-10-14
Last modified2026-10-18
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Description

Memory safety bug present in Firefox 143 and Thunderbird 143. This bug showed evidence of memory corruption and we presume that with enough effort this could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 144 and Thunderbird 144.

Weakness classification

  • nvd@nist.gov: CWE-119
  • 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-119

Primary references