Critical severity9.8NVD Advisory· Published Feb 16, 2023· Updated Jun 17, 2026
CVE-2021-43529
CVE-2021-43529
Description
Thunderbird versions prior to 91.3.0 are vulnerable to the heap overflow described in CVE-2021-43527 when processing S/MIME messages. Thunderbird versions 91.3.0 and later will not call the vulnerable code when processing S/MIME messages that contain certificates with DER-encoded DSA or RSA-PSS signatures.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
2<91.3.0+ 1 more
- (no CPE)range: <91.3.0
- (no CPE)range: unspecified
Patches
Vulnerability mechanics
References
1- bugzilla.mozilla.org/show_bug.cginvdIssue Tracking
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