Microsoft Exchange Server Validation Key Remote Code Execution Vulnerability (CVE-2020-0688)
Severity: high · Patch status: patched · Since 2021-11-03 · CVE-2020-0688
Microsoft Exchange Server Validation Key fails to properly create unique keys at install time, allowing for remote code execution. CISA added CVE-2020-0688 to its Known Exploited Vulnerabilities catalog on Nov 3, 2021, which means attackers are exploiting it in the wild. CISA reports known use in ransomware campaigns.
What to do
- Apply updates per vendor instructions.
- US federal agencies must remediate by May 3, 2022 (BOD 22-01); treat that as the outer limit.
Sources
All live incidents on Threat Watch
