CVE-2025-6436

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2025-6436
Memory safety bugs present in Firefox 139 and Thunderbird 139. 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 < 140.

8.1 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 2.2 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity HIGH

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=1941377%2C1960948%2C1966187%2C1966505%2C1970764 Broken Link
https://www.mozilla.org/security/advisories/mfsa2025-51/ Vendor Advisory
Configurations

Configuration 1 (hide)

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

03 Jul 2025, 16:09

Type Values Removed Values Added
First Time Mozilla firefox
Mozilla
References () https://bugzilla.mozilla.org/buglist.cgi?bug_id=1941377%2C1960948%2C1966187%2C1966505%2C1970764 - () https://bugzilla.mozilla.org/buglist.cgi?bug_id=1941377%2C1960948%2C1966187%2C1966505%2C1970764 - Broken Link
References () https://www.mozilla.org/security/advisories/mfsa2025-51/ - () https://www.mozilla.org/security/advisories/mfsa2025-51/ - Vendor Advisory
CPE cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*

26 Jun 2025, 14:15

Type Values Removed Values Added
CVSS v2 : unknown
v3 : 6.5 		v2 : unknown
v3 : 8.1

25 Jun 2025, 14:15

Type Values Removed Values Added
CWE CWE-119
Summary
  • (es) Errores de seguridad de memoria presentes en Firefox 139 y Thunderbird 139. 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 anterior a la versión 140.

24 Jun 2025, 19:15

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 6.5

24 Jun 2025, 13:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-06-24 13:15

Updated : 2025-07-03 16:09

NVD link : CVE-2025-6436

Mitre link : CVE-2025-6436

CVE.ORG link : CVE-2025-6436

JSON object : View

Products Affected

mozilla

  • firefox
CWE
CWE-119

Improper Restriction of Operations within the Bounds of a Memory Buffer