Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2021-29964

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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 54.8%
CVSS Severity
CVSS v3 Score 7.1
CVSS v2 Score 5.8
Products affected by CVE-2021-29964


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