vulnerability
MFSA2021-30 Thunderbird: Security Vulnerabilities fixed in Thunderbird 78.12 (CVE-2021-29976)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 7 | (AV:N/AC:M/Au:N/C:P/I:P/A:P) | Jul 13, 2021 | Jul 14, 2021 | Aug 12, 2025 |
Severity
7
CVSS
(AV:N/AC:M/Au:N/C:P/I:P/A:P)
Published
Jul 13, 2021
Added
Jul 14, 2021
Modified
Aug 12, 2025
Description
Mozilla developers reported memory safety bugs present in code shared between Firefox and Thunderbird. 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 < 78.12, Firefox ESR < 78.12, and Firefox < 90.
Solution
mozilla-thunderbird-upgrade-78_12
NEW
Explore Exposure Command
Confidently identify and prioritize exposures from endpoint to cloud with full attack surface visibility and threat-aware risk context.