CVE-2025-10537CWE-119

CVE-2025-10537

High · published September 16, 2025

CVSS v3.1
8.8
EPSS
0%
Percentile
24.6
In the wild
Unconfirmed
What it is

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 was fixed in Firefox 143, Firefox ESR 140.3, Thunderbird 143, and Thunderbird 140.3.

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00328 · 24.6th percentile
Weakness
CWE-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer
Published
2025-09-16T17:15Z
Affected products (4)
ProductVersionsFixed in
mozilla/firefox< 140.3.0140.3.0
mozilla/firefox< 143.0143.0
mozilla/thunderbird< 140.3.0140.3.0
mozilla/thunderbird< 143.0143.0
References (7)
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1938220%2C1980730%2C1981280%2C1981283%2C1984505%2C1985067 · [email protected]https://www.mozilla.org/security/advisories/mfsa2025-73/ · [email protected]https://www.mozilla.org/security/advisories/mfsa2025-75/ · [email protected]https://www.mozilla.org/security/advisories/mfsa2025-77/ · [email protected]https://www.mozilla.org/security/advisories/mfsa2025-78/ · [email protected]https://lists.debian.org/debian-lts-announce/2025/09/msg00020.html · af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2025/09/msg00026.html · af854a3a-2127-422b-91ae-364da2661108
EPSS history
Timeline
  • 16 SEP 12:26Z
    Memory safety bugs fixed in Firefox ESR 140.3, Thunderbird ESR 140.3, Firefox 143 and Thunderbird 143
    cvelistv5