CVE-2021-29976: Mozilla Thunderbird

Mozilla Thunderbird: Mozilla developers reported memory safety bugs present in code shared between Firefox and…

No CVSS scoreEPSS 0.012 · 68th percentile

Published by the CVE Program (CNA: mozilla) at 5 Aug 2021, 19:46 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Mozilla	Thunderbird	affected unspecified to before 78.12 custom
Mozilla	Firefox ESR	affected unspecified to before 78.12 custom
Mozilla	Firefox	affected unspecified to before 90 custom

Identifiers

CVE-2021-29976

CNA

mozilla

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

No source has published a CVSS score for this record yet.

CISA KEV Not listed.
EPSS 0.012, the 68th percentile, on 9 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 5 Aug 2021. New records show when each source confirmed them.

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.