Actively exploited · Published Feb 5, 2019 · Assigned by mitre
CVE-2018-20753
Critical 9.8 Exploited Ransomware
In plain English
A critical-severity security flaw in Virtual System/Server Administrator (VSA) from Kaseya. Attackers are actively exploiting it in the wild (listed by CISA on April 13, 2022). It has been used in ransomware campaigns. The chance it is exploited in the next 30 days is estimated at 29.6% (higher than 98% of all known vulnerabilities). Apply updates per vendor instructions.
CISA guidance
Apply updates per vendor instructions.
Federal agencies must remediate by May 4, 2022.
Official description
Kaseya VSA RMM before R9.3 9.3.0.35, R9.4 before 9.4.0.36, and R9.5 before 9.5.0.5 allows unprivileged remote attackers to execute PowerShell payloads on all managed devices. In January 2018, attackers actively exploited this vulnerability in the wild.