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Mozilla Firefox and Thunderbird Memory Safety Vulnerability Allowing Arbitrary Code Execution

Vulnerability

A vulnerability has been identified in Mozilla Firefox and Thunderbird applications, specifically in versions prior to 141, and in Firefox and Thunderbird ESR 140.0. This vulnerability arises from memory safety issues that suggest potential memory corruption, which could be exploited to execute arbitrary code.

Impact

Exploitation of this vulnerability could lead to arbitrary code execution.

Remediation

Users can upgrade to Firefox 141, Firefox ESR 140.1, Thunderbird 141 or Thunderbird ESR 140.1 to address this vulnerability.

Added: Jul 22, 2025, 9:20 PM
Updated: Jul 22, 2025, 9:20 PM

Vulnerability Rating

Custom Algorithm
spread
8.4
impact
7.5
exploitability
4.4
remediation
7.7
relevance
0.3
threat
0.0
urgency
2.9
incentive
0.8

Our algorithm analyzes dozens of metrics to generate these 8 key vulnerability categories, which are then combined to calculate the overall risk score.