CVE-2025-5269CWE-787

CVE-2025-5269

High · published May 27, 2025

CVSS v3.1
8.1
EPSS
0%
Percentile
39.1
In the wild
Unconfirmed
What it is

Memory safety bug present in Firefox ESR 128.10, and Thunderbird 128.10. This bug showed evidence of memory corruption and we presume that with enough effort this could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox ESR 128.11 and Thunderbird 128.11.

The record
Technical detail
CVSS v3.1
8.1 · HIGH
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00463 · 39.1th percentile
Weakness
CWE-787 · Out-of-bounds Write
Published
2025-05-27T17:15Z
Affected products (2)
ProductVersionsFixed in
mozilla/firefox< 128.11.0128.11.0
mozilla/thunderbird< 128.11.0128.11.0
References (5)
https://bugzilla.mozilla.org/show_bug.cgi?id=1924108 · [email protected]https://www.mozilla.org/security/advisories/mfsa2025-44/ · [email protected]https://www.mozilla.org/security/advisories/mfsa2025-46/ · [email protected]https://lists.debian.org/debian-lts-announce/2025/05/msg00043.html · af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2025/05/msg00046.html · af854a3a-2127-422b-91ae-364da2661108
EPSS history
Timeline
  • 27 MAY 12:29Z
    Memory safety bug fixed in Firefox ESR 128.11 and Thunderbird 128.11
    cvelistv5