CVE-2021-23965

HIGH

Firefox < 85.0 - Memory Corruption and Potential Remote Code Execution

Title source: llm
STIX 2.1

Description

Mozilla developers reported memory safety bugs present in Firefox 84. 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 < 85.

References (2)

Core 2
Core References
Release Notes, Vendor Advisory x_refsource_misc
https://www.mozilla.org/security/advisories/mfsa2021-03/
Exploit, Issue Tracking, Patch, Vendor Advisory x_refsource_misc
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1670378%2C1673555%2C1676812%2C1678582%2C1684497

Scores

CVSS v3 8.8
EPSS 0.0032
EPSS Percentile 55.4%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Details

CWE
CWE-787
Status published
Products (1)
mozilla/firefox < 85.0
Published Feb 26, 2021
Tracked Since Feb 18, 2026