CVE-2025-14329Network attack vector

Privilege escalation via undisclosed Netmonitor flaw

Published Dec 9, 2025 · Updated Apr 13, 2026

Privilege escalation in Mozilla Firefox and Thunderbird before 146 allows remote attackers to gain elevated privileges through user interaction. Mozilla identifies the affected locus only as the Netmonitor component and has not published the wrong operation performed on untrusted input. Exploitation requires user interaction, and public sources do not disclose the necessary content, action, or resulting privilege boundary.

CVSS severity8.8
High
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Privilege escalation in Mozilla Firefox and Thunderbird before 146 allows remote attackers to gain elevated privileges through user interaction. Mozilla identifies the affected locus only as the Netmonitor component and has not published the wrong operation performed on untrusted input. Exploitation requires user interaction, and public sources do not disclose the necessary content, action, or resulting privilege boundary.

The record

CVE
CVE-2025-14329
Published
Dec 9, 2025
Updated
Apr 13, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1068
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 9, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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