CVE-2025-10537

high

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 affects Firefox < 143, Firefox ESR < 140.3, Thunderbird < 143, and Thunderbird < 140.3.

References

https://www.mozilla.org/security/advisories/mfsa2025-78/

https://www.mozilla.org/security/advisories/mfsa2025-77/

https://www.mozilla.org/security/advisories/mfsa2025-75/

https://www.mozilla.org/security/advisories/mfsa2025-73/

https://bugzilla.mozilla.org/buglist.cgi?bug_id=1938220%2C1980730%2C1981280%2C1981283%2C1984505%2C1985067

Details

Source: Mitre, NVD

Published: 2025-09-16

Updated: 2025-09-16

Risk Information

CVSS v2

Base Score: 10

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

Severity: Critical

CVSS v3

Base Score: 8.8

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

Severity: High

EPSS

EPSS: 0.0004