What’s Vulnerable › Vulnerabilities

CVE-2021-29956

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-06-24 · updated 2026-06-17
• Weakness: CWE-312

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.

Affected products

• Mozilla Thunderbird: from 78.8.1 through 78.10.1

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=1710290
• https://www.mozilla.org/security/advisories/mfsa2021-22/
• https://bugzilla.mozilla.org/show_bug.cgi?id=1710290
• https://www.mozilla.org/security/advisories/mfsa2021-22/

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