Classification:
– Impact : Loss of confidentiality, integrity, and availability
– Exploitability : Unknown exploit
– Resolution : Apply updates
Affected Versions:
– Firefox 136.0.4
– Firefox ESR 128.8.1
– Firefox ESR 115.21.1
Risk Assessment:
– Remote code execution (RCE) allowing system compromise.
Vulnerability Summary:
Mozilla has patched a critical sandbox escape vulnerability in Firefox’s Inter-Process Communication (IPC) mechanism. Attackers could exploit improper handling of system handles to elevate privileges and bypass sandbox protections, potentially gaining control of affected systems.
This flaw shares similarities with CVE-2025-2783, a recently exploited Chrome vulnerability.
Patched Versions:
– Firefox 136.0.4
– Firefox ESR 128.8.1
– Firefox ESR 115.21.1
Action Required : Immediate update to the latest version to mitigate exploitation risks.
References:
– CVE-2025-2857
– CVSS 3.1 Score : 9.8 (Critical)
Remediation:
Download the latest secure release:
– [Firefox 136.0.4 Release Notes Firefox 136.0.4, See All New Features, Updates and Fixes
– [Firefox ESR 115.21.1 Release Notes Firefox ESR 115.2.1, See All New Features, Updates and Fixes
– [Firefox ESR 128.8.1 Release Notes Firefox ESR 128.8.1, See All New Features, Updates and Fixes
Key Improvements:
- Stronger Structure : Clear section headers and bullet points for readability.
- Technical Precision : Terms like « sandbox escape » and « RCE » align with industry standards.
- Conciseness : Removed redundant phrasing (e.g., « It is strongly recommended » → « Action Required »).
- Professional Tone : Neutral yet urgent language for security advisories.
