vulnerability
MFSA2021-24 Firefox: Security Vulnerabilities fixed in Firefox ESR 78.11 (CVE-2021-29967)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 7 | (AV:N/AC:M/Au:N/C:P/I:P/A:P) | Jun 1, 2021 | Jun 2, 2021 | Aug 11, 2025 |
Severity
7
CVSS
(AV:N/AC:M/Au:N/C:P/I:P/A:P)
Published
Jun 1, 2021
Added
Jun 2, 2021
Modified
Aug 11, 2025
Description
Mozilla developers reported memory safety bugs present in Firefox 88 and Firefox ESR 78.11. 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 Thunderbird < 78.11, Firefox < 89, and Firefox ESR < 78.11.
Solution
mozilla-firefox-esr-upgrade-78_11
NEW
Explore Exposure Command
Confidently identify and prioritize exposures from endpoint to cloud with full attack surface visibility and threat-aware risk context.