CVE-2025-9187

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2025-9187
Memory safety bugs present in Firefox 141 and Thunderbird 141. 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 142 and Thunderbird 142.

9.8 /10

CVSS v3 : CRITICAL

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1825621%2C1970079%2C1976736%2C1979072 Broken Link
https://www.mozilla.org/security/advisories/mfsa2025-64/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-70/ Vendor Advisory
Configurations

Configuration 1 (hide)

OR cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*
History

13 Apr 2026, 15:17

Type Values Removed Values Added
Summary (en) Memory safety bugs present in Firefox 141 and Thunderbird 141. 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 affects Firefox < 142 and Thunderbird < 142. (en) Memory safety bugs present in Firefox 141 and Thunderbird 141. 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 142 and Thunderbird 142.

21 Aug 2025, 18:28

Type Values Removed Values Added
CPE cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*
References () https://bugzilla.mozilla.org/buglist.cgi?bug_id=1825621%2C1970079%2C1976736%2C1979072 - () https://bugzilla.mozilla.org/buglist.cgi?bug_id=1825621%2C1970079%2C1976736%2C1979072 - Broken Link
References () https://www.mozilla.org/security/advisories/mfsa2025-64/ - () https://www.mozilla.org/security/advisories/mfsa2025-64/ - Vendor Advisory
References () https://www.mozilla.org/security/advisories/mfsa2025-70/ - () https://www.mozilla.org/security/advisories/mfsa2025-70/ - Vendor Advisory
First Time Mozilla
Mozilla firefox
Mozilla thunderbird

20 Aug 2025, 16:15

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 9.8
CWE CWE-119

20 Aug 2025, 14:39

Type Values Removed Values Added
Summary
  • (es) Errores de seguridad de memoria presentes en Firefox 141 y Thunderbird 141. Algunos de estos errores mostraron evidencia de corrupción de memoria y presumimos que, con suficiente esfuerzo, algunos de ellos podrían haberse explotado para ejecutar código arbitrario. Esta vulnerabilidad afecta a Firefox 142 y Thunderbird 142.

19 Aug 2025, 21:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-08-19 21:15

Updated : 2026-04-13 15:17

NVD link : CVE-2025-9187

Mitre link : CVE-2025-9187

CVE.ORG link : CVE-2025-9187

JSON object : View

Products Affected

mozilla

  • firefox
  • thunderbird
CWE
CWE-119

Improper Restriction of Operations within the Bounds of a Memory Buffer