CVE-2025-9181
MEDIUM severity · CVSS 6.5 · CWE-457
6.5CVSS MEDIUM
Summary
Uninitialized memory in the JavaScript Engine component. This vulnerability was fixed in Firefox 142, Firefox ESR 128.14, Firefox ESR 140.2, Thunderbird 142, Thunderbird 128.14, and Thunderbird 140.2.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionRequired
Confidentiality impactHigh
Integrity impactNone
Availability impactNone
Exploit probability (EPSS)0%
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Affected products we track (1)
Recommendation
Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.
Additional information
- NVD record
- https://www.mozilla.org/security/advisories/mfsa2025-64/Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-66/Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-67/Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-70/Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-71/Advisory
- https://www.mozilla.org/security/advisories/mfsa2025-72/Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1977130
- https://lists.debian.org/debian-lts-announce/2025/08/msg00016.html