CVE-2025-14333

high

Description

Memory safety bugs present in Firefox ESR 140.5, Thunderbird ESR 140.5, Firefox 145 and Thunderbird 145. 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 146, Firefox ESR 140.6, Thunderbird 146, and Thunderbird 140.6.

References

https://www.mozilla.org/security/advisories/mfsa2025-96/

https://www.mozilla.org/security/advisories/mfsa2025-95/

https://www.mozilla.org/security/advisories/mfsa2025-94/

https://www.mozilla.org/security/advisories/mfsa2025-92/

https://bugzilla.mozilla.org/buglist.cgi?bug_id=1966501%2C1997639

Details

Source: Mitre, NVD

Published: 2025-12-09

Updated: 2026-04-13

Risk Information

CVSS v2

Base Score: 7.6

Vector: CVSS2#AV:N/AC:H/Au:N/C:C/I:C/A:C

Severity: High

CVSS v3

Base Score: 8.1

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Severity: High

EPSS

EPSS: 0.0004