Critical severity9.8NVD Advisory· Published Oct 14, 2025· Updated Apr 13, 2026
CVE-2025-11721
CVE-2025-11721
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
5cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*range: >=143.0,<144.0
- (no CPE)range: <=143
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*range: >=143.0,<144.0
- (no CPE)range: <=143
Patches
Vulnerability mechanics
References
3- www.mozilla.org/security/advisories/mfsa2025-81/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2025-84/nvdVendor Advisory
- bugzilla.mozilla.org/show_bug.cginvdIssue TrackingPermissions Required
News mentions
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