Kaseya VSA Remote Code Execution Vulnerability

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

1. Feb 4, 2019 · Catalog

   Detected

   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.

2. Apr 13, 2022 · CISA KEV

   Known exploited

   Apply updates per vendor instructions.

3. May 4, 2022 · CISA KEV

   Remediation due

   Apply updates per vendor instructions.

4. Aug 12, 2026 · Catalog

   Updated

   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.

Affected

• cpe kaseya/virtual system administratorversion unspecified
• vendor Kaseya Virtual System/Server Administrator (VSA)version unspecified

Sources

• CISA KEVConfirmed exploitationCVE-2018-20753

  Kaseya VSA RMM allows unprivileged remote attackers to execute PowerShell payloads on all managed devices.

  cisa.gov
• CVE.orgVulnerability recordCVE-2018-20753

  Official CVE identifier

  cve.org
• FIRST EPSSExploitation probabilityCVE-2018-20753

  30-day exploitation probability 29.6%

  first.org
• NIST NVDVulnerability recordCVE-2018-20753

  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.

  nvd.nist.gov

References

• Exploit · blog.huntresslabs.com
• Vendor Advisory · helpdesk.kaseya.com
• CISA note · nvd.nist.gov
• US Government Resource · cisa.gov