CVE-2018-20753
Published: April 13, 2022
Official Description
Kaseya VSA RMM allows unprivileged remote attackers to execute PowerShell payloads on all managed devices.
CISA KEV Advisory
Kaseya VSA Remote Code Execution Vulnerability
Kaseya VSA RMM allows unprivileged remote attackers to execute PowerShell payloads on all managed devices.
Apply updates per vendor instructions.
Risk Analysis
This Kaseya VSA RMM vulnerability allows an unprivileged remote attacker to execute PowerShell commands on all managed devices. Its inclusion in the CISA KEV catalog and high EPSS score of 0.37706 confirm its active exploitation and high likelihood of future attacks, making it a critical issue.
This vulnerability is actively being exploited in the wild and is part of the CISA Known Exploited Vulnerabilities Catalog. The ability for unprivileged remote attackers to execute payloads suggests it is easily exploitable remotely.
Apply all available security updates for Kaseya VSA RMM. Implement strong access controls and monitor managed devices for unusual PowerShell activity.
Technical Analysis
CVE-2018-20753 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2018-20753 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Exploit & PoC Resources
All References (1)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2018-20753 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1