CVE-2025-10537: Vulnerability in Mozilla Firefox
Memory safety bugs present in Firefox ESR 140.2, Thunderbird ESR 140.2, Firefox 142 and Thunderbird 142. 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 143, Firefox ESR 140.3, Thunderbird 143, and Thunderbird 140.3.
AI Analysis
Technical Summary
This vulnerability consists of memory safety bugs in specific versions of Mozilla Firefox and Thunderbird (ESR 140.2, 142). The bugs showed evidence of memory corruption, which could allow an attacker to execute arbitrary code with user interaction. The CVSS score is 8.8 (high), reflecting the network attack vector, low attack complexity, no privileges required, user interaction required, and high impact on confidentiality, integrity, and availability. Mozilla addressed these issues in Firefox 143, Firefox ESR 140.3, Thunderbird 143, and Thunderbird ESR 140.3 as detailed in their security advisories MFSA2025-73 and MFSA2025-75.
Potential Impact
Successful exploitation could lead to arbitrary code execution in the context of the user running the affected Firefox or Thunderbird versions. This impacts confidentiality, integrity, and availability of the affected systems. No active exploitation has been observed in the wild according to the provided data.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 143, Firefox ESR 140.3, Thunderbird 143, and Thunderbird ESR 140.3. Users and administrators should update to these versions or later to remediate this issue. Since the vulnerability is fixed in these releases, no additional mitigation steps are required beyond applying the official updates.
CVE-2025-10537: Vulnerability in Mozilla Firefox
Description
Memory safety bugs present in Firefox ESR 140.2, Thunderbird ESR 140.2, Firefox 142 and Thunderbird 142. 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 143, Firefox ESR 140.3, Thunderbird 143, and Thunderbird 140.3.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability consists of memory safety bugs in specific versions of Mozilla Firefox and Thunderbird (ESR 140.2, 142). The bugs showed evidence of memory corruption, which could allow an attacker to execute arbitrary code with user interaction. The CVSS score is 8.8 (high), reflecting the network attack vector, low attack complexity, no privileges required, user interaction required, and high impact on confidentiality, integrity, and availability. Mozilla addressed these issues in Firefox 143, Firefox ESR 140.3, Thunderbird 143, and Thunderbird ESR 140.3 as detailed in their security advisories MFSA2025-73 and MFSA2025-75.
Potential Impact
Successful exploitation could lead to arbitrary code execution in the context of the user running the affected Firefox or Thunderbird versions. This impacts confidentiality, integrity, and availability of the affected systems. No active exploitation has been observed in the wild according to the provided data.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 143, Firefox ESR 140.3, Thunderbird 143, and Thunderbird ESR 140.3. Users and administrators should update to these versions or later to remediate this issue. Since the vulnerability is fixed in these releases, no additional mitigation steps are required beyond applying the official updates.
Technical Details
- Data Version
- 5.1
- Assigner Short Name
- mozilla
- Date Reserved
- 2025-09-16T06:48:52.559Z
- Cvss Version
- null
- State
- PUBLISHED
Threat ID: 68c958bfff7c553b3ddd1f0a
Added to database: 9/16/2025, 12:31:59 PM
Last enriched: 4/14/2026, 11:34:35 AM
Last updated: 5/10/2026, 1:55:46 AM
Views: 87
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