CVE-2021-29964

EPSS 0.8%

Vexday Risk Score

3Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS —EPSS 0.8%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

24 Jun 2021Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

A locally-installed hostile program could send `WM_COPYDATA` messages that Firefox would process incorrectly, leading to an out-of-bounds read. *This bug only affects Firefox on Windows. Other operating systems are unaffected.*. This vulnerability affects Thunderbird < 78.11, Firefox < 89, and Firefox ESR < 78.11.

Affected products

Mozilla · Firefox Mozilla · Firefox ESR Mozilla · Thunderbird

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References

https://bugzilla.mozilla.org/show_bug.cgi?id=1706501 https://www.mozilla.org/security/advisories/mfsa2021-23/https://www.mozilla.org/security/advisories/mfsa2021-24/https://www.mozilla.org/security/advisories/mfsa2021-26/