Bevis Tseng

**Name of the Vulnerable Software and Affected Versions** Firefox versions prior to 55 Firefox ESR versions prior to 52.3 Thunderbird versions prior to 52.3 **Description** Memory safety bugs were reported, showing evidence of memory corruption. It is presumed that with enough effort, some of these bugs could be exploited to run arbitrary code. **Recommendations** For Firefox versions prior to 55, update to version 55 or later. For Firefox ESR versions prior to 52.3, update to version 52.3 or later. For Thunderbird versions prior to 52.3, update to version 52.3 or later.