CVE-2025-14329
CVE-2025-14329 is a high-severity vulnerability in Mozilla Firefox with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.
Key facts
- Severity: High (CVSS 3.x base score 8.8)
- EPSS exploit prediction: 0% (26th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-201939
- Affected product: Mozilla Firefox
- Published:
- Last modified:
Description
Privilege escalation in the Netmonitor component. This vulnerability was fixed in Firefox 146, Firefox ESR 140.6, Thunderbird 146, and Thunderbird 140.6.
Frequently asked questions
- What is CVE-2025-14329?
- Privilege escalation in the Netmonitor component. This vulnerability was fixed in Firefox 146, Firefox ESR 140.6, Thunderbird 146, and Thunderbird 140.6.
- How severe is CVE-2025-14329?
- CVE-2025-14329 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2025-14329 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (26th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2025-14329?
- CVE-2025-14329 primarily affects Mozilla Firefox. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2025-14329?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2025-14329 have an EU (EUVD) identifier?
- Yes. CVE-2025-14329 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-201939.
- When was CVE-2025-14329 published?
- CVE-2025-14329 was published on 2025-12-09 and last updated on 2026-06-17.
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1997018
- https://www.mozilla.org/security/advisories/mfsa2025-92/
- https://www.mozilla.org/security/advisories/mfsa2025-94/
- https://www.mozilla.org/security/advisories/mfsa2025-95/
- https://www.mozilla.org/security/advisories/mfsa2025-96/
Affected products (4)
- cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
- cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:*
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*
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