CVE-2025-5268

HIGH

Firefox < 139.0 and Thunderbird < 128.11.0 - Memory Corruption

Title source: llm
STIX 2.1

Description

Memory safety bugs present in Firefox 138, Thunderbird 138, Firefox ESR 128.10, and Thunderbird 128.10. 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 139, Firefox ESR 128.11, Thunderbird 139, and Thunderbird 128.11.

References (7)

Core 7

Scores

CVSS v3 8.1
EPSS 0.0044
EPSS Percentile 63.2%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-119
Status published
Products (7)
mozilla/firefox < 128.11.0
mozilla/firefox < 139.0
Mozilla/Firefox 128.11 - 128.*
Mozilla/Firefox 139
mozilla/thunderbird < 128.11.0
Mozilla/Thunderbird 128.11 - 128.*
Mozilla/Thunderbird 139
Published May 27, 2025
Tracked Since Feb 18, 2026