CVE-2026-7321 - Vulnerability Analysis

Overview

Firefox ESR < 140.10.1 contains a sandbox escape caused by incorrect boundary conditions in the WebRTC Networking component, letting attackers escape sandbox restrictions, exploit requires no special conditions.

Severity & Score

Impact

Attackers can escape sandbox restrictions, potentially leading to full system compromise.

Mitigation

Update to Firefox ESR 140.10.1 or later.

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=2029461
• https://www.mozilla.org/security/advisories/mfsa2026-36/
• https://www.mozilla.org/security/advisories/mfsa2026-30/
• https://www.mozilla.org/security/advisories/mfsa2026-33/

Social Media Activity(1 post)

TheHackerWire

@thehackerwire

Apr 28, 2026

🔴 CVE-2026-7321 - Critical (9.6) Sandbox escape due to incorrect boundary conditions in the WebRTC: Networking component. This vulnerability was fixed in Firefox ESR 140.10.1. 🔗 https://www.thehackerwire.com/vulnerability/CVE-2026-7321/ #CVE #vulnerability #infosec #cybersecurity #security #Tenda #patchstack

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