Original release date: August 18, 2021
Mozilla has released security updates to address vulnerabilities in Firefox and Thunderbird. An attacker could exploit some of these vulnerabilities to take control of an affected system.
CISA encourages users and administrators to review the Mozilla Security Advisory for Firefox 91.0.1 and Thunderbird 91.0.1 and apply the necessary updates.
This product is provided subject to this Notification and this Privacy & Use policy.
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