CVE-2025-8040

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2025-8040
Memory safety bugs present in Firefox ESR 140.0, Thunderbird ESR 140.0, Firefox 140 and Thunderbird 140. 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 < 141, Firefox ESR < 140.1, Thunderbird < 141, and Thunderbird < 140.1.

8.8 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1975058%2C1975998
https://www.mozilla.org/security/advisories/mfsa2025-56/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-59/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-61/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-63/ Vendor Advisory
Configurations

Configuration 1 (hide)

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

30 Jul 2025, 17:15

Type Values Removed Values Added
References
  • {'url': 'https://bugzilla.mozilla.org/buglist.cgi?bug_id=1975058%2C1975058%2C1975998%2C1975998', 'tags': ['Broken Link'], 'source': 'security@mozilla.org'}
  • () https://bugzilla.mozilla.org/buglist.cgi?bug_id=1975058%2C1975998 -

28 Jul 2025, 14:00

Type Values Removed Values Added
References () https://bugzilla.mozilla.org/buglist.cgi?bug_id=1975058%2C1975058%2C1975998%2C1975998 - () https://bugzilla.mozilla.org/buglist.cgi?bug_id=1975058%2C1975058%2C1975998%2C1975998 - Broken Link
References () https://www.mozilla.org/security/advisories/mfsa2025-56/ - () https://www.mozilla.org/security/advisories/mfsa2025-56/ - Vendor Advisory
References () https://www.mozilla.org/security/advisories/mfsa2025-59/ - () https://www.mozilla.org/security/advisories/mfsa2025-59/ - Vendor Advisory
References () https://www.mozilla.org/security/advisories/mfsa2025-61/ - () https://www.mozilla.org/security/advisories/mfsa2025-61/ - Vendor Advisory
References () https://www.mozilla.org/security/advisories/mfsa2025-63/ - () https://www.mozilla.org/security/advisories/mfsa2025-63/ - Vendor Advisory
First Time Mozilla
Mozilla firefox
Mozilla thunderbird
CPE cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*

23 Jul 2025, 16:15

Type Values Removed Values Added
Summary
  • (es) Errores de seguridad de memoria presentes en Firefox ESR 140.0, Thunderbird ESR 140.0, Firefox 140 y Thunderbird 140. 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 &lt; 141, Firefox ESR &lt; 140.1, Thunderbird &lt; 141 y Thunderbird &lt; 140.1.
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 8.8
CWE CWE-119

22 Jul 2025, 21:15

Type Values Removed Values Added
New CVE
Information

Published : 2025-07-22 21:15

Updated : 2025-07-30 17:15

NVD link : CVE-2025-8040

Mitre link : CVE-2025-8040

CVE.ORG link : CVE-2025-8040

JSON object : View

Products Affected

mozilla

  • firefox
  • thunderbird
CWE
CWE-119

Improper Restriction of Operations within the Bounds of a Memory Buffer