CVE-2021-29989

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 91 Firefox ESR versions prior to 78.13 Thunderbird versions prior to 78.13

Description The issue is related to memory safety bugs, including evidence of memory corruption, which could potentially be exploited to run arbitrary code with sufficient effort. It is also associated with a boundary error when processing HTML content, allowing a remote attacker to execute arbitrary code and cause memory damage.

Recommendations For Firefox versions prior to 91, update to version 91 or later. For Firefox ESR versions prior to 78.13, update to version 78.13 or later. For Thunderbird versions prior to 78.13, update to version 78.13 or later.