Microsoft Exchange Server Privilege Escalation Vulnerability (CVE-2018-8581)
Severity: high · Patch status: patched · Since 2022-03-03 · CVE-2018-8581
A privilege escalation vulnerability exists in Microsoft Exchange Server. An attacker who successfully exploited this vulnerability could attempt to impersonate any other user of the Exchange server. CISA added CVE-2018-8581 to its Known Exploited Vulnerabilities catalog on Mar 3, 2022, 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 Mar 17, 2022 (BOD 22-01); treat that as the outer limit.
Sources
All live incidents on Threat Watch
