CVE-2021-29956

high
Published — · Modified —
CVSS v3
CVSS v2
VIR risk
8.0

Description

OpenPGP secret keys that were imported using Thunderbird version 78.8.1 up to version 78.10.1 were stored unencrypted on the user's local disk. The master password protection was inactive for those keys. Version 78.10.2 will restore the protection mechanism for newly imported keys, and will automatically protect keys that had been imported using affected Thunderbird versions. This vulnerability affects Thunderbird < 78.10.2.

Predictions

Exploit likelihood
20%
Patch ETA

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2021-29956

vendor Authored 2026-05-27

Vendor advisory: rocky — https://errata.rockylinux.org/RLSA-2021:2264

vendor Authored 2026-05-27

Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2021-29956.html

vendor Authored 2026-05-27

Vendor advisory: arch — https://security.archlinux.org/ASA-202105-29

OS impact

OSVersionStatusFixed in
arch archfixed78.10.2-1
suse slesaffected
rockylinux rocky8fixed
debian debianbookwormfixed1:78.10.2-1
debian debianbullseyefixed1:78.10.2-1
debian debianforkyfixed1:78.10.2-1
debian debiansidfixed1:78.10.2-1
debian debiantrixiefixed1:78.10.2-1

References

Verify integrity in audit chain (admin only). AS-IS.