CVE-2026-4717 - Vulnerability Analysis

Overview

Firefox < 149 and Firefox ESR < 140.9 contain a privilege escalation caused by a vulnerability in the Netmonitor component, letting attackers escalate their privileges, exploit requires no special conditions.

Severity & Score

Impact

Attackers can escalate their privileges, potentially gaining unauthorized access or control.

Mitigation

Update to Firefox 149 and Firefox ESR 140.9 or later.

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=2021695
• https://www.mozilla.org/security/advisories/mfsa2026-20/
• https://www.mozilla.org/security/advisories/mfsa2026-22/
• https://www.mozilla.org/security/advisories/mfsa2026-23/
• https://www.mozilla.org/security/advisories/mfsa2026-24/

Social Media Activity(1 post)

TheHackerWire

@thehackerwire

Mar 24, 2026

🔴 CVE-2026-4717 - Critical (9.8) Privilege escalation in the Netmonitor component. This vulnerability affects Firefox < 149, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9. 🔗 https://www.thehackerwire.com/vulnerability/CVE-2026-4717/ #CVE #vulnerability #infosec #cybersecurity #security #Tenda #patchstack

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