Buffer overflow in Mozilla Firefox
CVE-2025-14332
Memory safety bugs present in Firefox 145 and Thunderbird 145. 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 146 and Thunderbird 146.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.003 (21.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 21.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000
Affected products
- Mozilla Firefox — versions 146
- Mozilla Thunderbird — versions 146
Weakness classification (CWE)
References
- bugzilla.mozilla.org/buglist.cgi (Issue Tracking, Broken Link)
- www.mozilla.org/security/advisories/mfsa2025-92/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2025-95/ (Vendor Advisory)
Frequently asked questions
- What is CVE-2025-14332?
- CVE-2025-14332 is a high-severity vulnerability in Mozilla Firefox, classified under Out-of-bounds Write. CVSS score: 7.3/10. Published 2025-12-09.
- How severe is CVE-2025-14332?
- High severity. CVSS v3 base score is 7.3 out of 10.