CVE-2025-14329: Privilege escalation in the Netmonitor component

Published Dec 9, 2025
·
Updated

Privilege escalation in the Netmonitor component. This vulnerability affects Firefox < 146 and Firefox ESR < 140.6.

Other sources

Privilege escalation in the Netmonitor component. This vulnerability was fixed in Firefox 146, Firefox ESR 140.6, Thunderbird 146, and Thunderbird 140.6.

— MITRE

Affected Software

10 affected componentsFixes available
Mozilla Firefox<146
Mozilla Firefox ESR<140.6
Mozilla Firefox ESR<140.6
140.6
Mozilla Firefox<146
146
Mozilla Thunderbird<146
146
Mozilla Thunderbird<140.6
140.6
Mozilla Firefox<140.6.0
Mozilla Firefox<146.0
Mozilla Thunderbird<140.6.0
Mozilla Thunderbird<146.0

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 140.6
  2. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 146
  3. Upgrade

    Upgrade Mozilla Firefox / Firefox ESR / Thunderbird (Netmonitor component) to a version that resolves this vulnerability.

    Fixed in 146
  4. Upgrade

    Upgrade Mozilla Firefox ESR (Netmonitor component) to a version that resolves this vulnerability.

    Fixed in 140.6
  5. Upgrade

    Upgrade Mozilla Thunderbird (Netmonitor component) to a version that resolves this vulnerability.

    Fixed in 146
  6. Upgrade

    Upgrade Mozilla Thunderbird (Netmonitor component) to a version that resolves this vulnerability.

    Fixed in 140.6

Event History

Dec 9, 2025
CVE Published
via Mozilla·12:00 AM
Data Sourced
via Mozilla·12:00 AM
DescriptionSeverityAffected Software
Updated
via Mozilla·12:00 AM
Affected Software
CVE Published
via MITRE·01:38 PM
Data Sourced
via MITRE·01:38 PM
Description
Data Sourced
via Red Hat·02:02 PM
DescriptionSeverityAffected Software
Data Sourced
via NVD·04:17 PM
DescriptionSeverityAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

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Frequently Asked Questions

1

What is the severity of CVE-2025-14329?

CVE-2025-14329 is considered a high severity vulnerability due to its potential for privilege escalation.

2

How do I fix CVE-2025-14329?

To fix CVE-2025-14329, update Mozilla Firefox to version 146 or later, or Firefox ESR to version 140.6 or later.

3

Which versions of Firefox are affected by CVE-2025-14329?

CVE-2025-14329 affects Firefox versions prior to 146 and Firefox ESR versions prior to 140.6.

4

What type of vulnerability is CVE-2025-14329?

CVE-2025-14329 is a privilege escalation vulnerability found in the Netmonitor component.

5

Who is impacted by CVE-2025-14329?

Users of Mozilla Firefox and Firefox ESR below the respective version thresholds are impacted by CVE-2025-14329.

Company

Resources

Contact

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