CVE-2026-124951: Mozilla Firefox · Privilege escalation in the Nimbus Desktop Client component
Affects Mozilla FirefoxSource CVE Database V5
Not known to be exploited.
Data as of 10 Nov 2026, 13:36 UTC
Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD
Thin evidence
One scorer or noneExploitation evidence
Disclosed: evidence found.
CVE published 10 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 10 Nov 2026.
What to do
AI-suggested
Users and administrators should update Mozilla Firefox to version 160 or later, or Firefox ESR 153.7 or later, to remediate this vulnerability. The fix is officially available and included in these releases. No additional mitigation steps are required beyond applying the update.
Description
CVE-2026-124951 is a privilege escalation vulnerability in the Nimbus Desktop Client component of Mozilla Firefox. This security flaw allows an attacker to gain elevated privileges within the affected component. The issue was addressed and fixed in Firefox version 160 and Firefox ESR 153.7. No known exploits in the wild have been reported. The vulnerability is considered high impact due to the potential for privilege escalation.