CVE-2025-14329 Privilege escalation in the Netmonitor component
An attacker can escalate privileges via the Netmonitor component in Firefox and Thunderbird, requiring users to upgrade to patched versions.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2025-14329?
CVE-2025-14329 is a high-severity vulnerability in Mozilla Firefox, published on 9 Dec 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Privilege escalation in the Netmonitor component. This vulnerability was fixed in Firefox 146, Firefox ESR 140.6, Thunderbird 146, and Thunderbird 140.6.
Which versions are affected by CVE-2025-14329?
It affects 2 products.
Products include Mozilla Firefox, Mozilla Thunderbird.
How do I fix CVE-2025-14329?
Upgrade to a fixed version.
Is CVE-2025-14329 being exploited?
There is no known exploitation of CVE-2025-14329 in the wild and no public exploit code.
Other vulnerabilities in Mozilla Firefox
Sources
Also known as DEBIAN-CVE-2025-14329, GHSA-vxvx-cxrx-x52j, UBUNTU-CVE-2025-14329.