CVE-2018-20753

kaseya virtual system administrator

Published 5 Feb 2019 · updated 13 Aug 2026 · Analyzed

9.8 Critical · CVSS 3.1, NVD

Exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on 13 Apr 2022, with a remediation deadline of 4 May 2022 for US federal agencies. It has been used in ransomware campaigns.

Required action: Apply updates per vendor instructions.

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.

References

blog.huntresslabs.com/deep-dive-kaseya-vsa-mining-payload-c0ac839a0e88 · Exploit, Third Party Advisory
helpdesk.kaseya.com/hc/en-gb/articles/360000333152 · Vendor Advisory
www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-20753 · US Government Resource