CVE-2025-6436

Memory safety bugs fixed in Firefox 140 and Thunderbird 140

CVSS 8.1 HIGHEPSS 2.9%CWE-119

Vexday Risk Score

21Bajo

Decisión SSVC (CISA)

Track

Sin señal de explotación → monitorear

CVSS 8.1EPSS 2.9%KEV nãoPoC —Nuclei —Metasploit —Patch —

Ciclo de vida

24 jun 2025Publicada en NVD

Recomendación: Monitorear — sin señal de explotación por ahora.

Memory safety bugs present in Firefox 139 and Thunderbird 139. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 140 and Thunderbird 140.

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Productos afectados

Mozilla · Firefox Mozilla · Thunderbird

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Referencias

https://bugzilla.mozilla.org/buglist.cgi?bug_id=1941377%2C1960948%2C1966187%2C1966505%2C1970764%2C1942930 https://www.mozilla.org/security/advisories/mfsa2025-51/https://www.mozilla.org/security/advisories/mfsa2025-54/