CVE-2025-1943: Vulnerability in Mozilla Firefox
Memory safety bugs present in Firefox 135 and Thunderbird 135. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 136 and Thunderbird 136.
AI Analysis
Technical Summary
This vulnerability concerns memory safety bugs in Firefox 135 and Thunderbird 135, with evidence of memory corruption that could allow arbitrary code execution if exploited. The issue is classified under CWE-122 (Heap-based Buffer Overflow). Mozilla released fixes for these bugs in Firefox 136 and Thunderbird 136. The CVSS v3.1 score is 8.2, indicating high severity, with network attack vector, low attack complexity, no privileges required, no user interaction, and impact limited to integrity and availability. The vendor advisory confirms the fixes and recommends upgrading to the patched versions.
Potential Impact
Successful exploitation of these memory safety bugs could lead to arbitrary code execution, compromising the integrity and availability of the affected systems. The vulnerability does not require user interaction or privileges, making it potentially exploitable remotely. However, no active exploits have been reported in the wild.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 136 and Thunderbird 136. Users and administrators should upgrade to these versions or later to remediate the issue. Since this is not a cloud service, patching the client software is required. There are no vendor advisories indicating that no action is required or that the issue is already mitigated without patching.
CVE-2025-1943: Vulnerability in Mozilla Firefox
Description
Memory safety bugs present in Firefox 135 and Thunderbird 135. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 136 and Thunderbird 136.
CVSS v3.1
Score 8.2high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability concerns memory safety bugs in Firefox 135 and Thunderbird 135, with evidence of memory corruption that could allow arbitrary code execution if exploited. The issue is classified under CWE-122 (Heap-based Buffer Overflow). Mozilla released fixes for these bugs in Firefox 136 and Thunderbird 136. The CVSS v3.1 score is 8.2, indicating high severity, with network attack vector, low attack complexity, no privileges required, no user interaction, and impact limited to integrity and availability. The vendor advisory confirms the fixes and recommends upgrading to the patched versions.
Potential Impact
Successful exploitation of these memory safety bugs could lead to arbitrary code execution, compromising the integrity and availability of the affected systems. The vulnerability does not require user interaction or privileges, making it potentially exploitable remotely. However, no active exploits have been reported in the wild.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 136 and Thunderbird 136. Users and administrators should upgrade to these versions or later to remediate the issue. Since this is not a cloud service, patching the client software is required. There are no vendor advisories indicating that no action is required or that the issue is already mitigated without patching.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2025-03-04T12:29:53.878Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 69a0a44b85912abc71d64b87
Added to database: 2/26/2026, 7:51:39 PM
Last enriched: 4/14/2026, 11:43:55 AM
Last updated: 5/29/2026, 8:17:56 PM
Views: 33
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