Critical 9.8Known exploited (CISA KEV)Published Feb 5, 2019

CVE-2018-20753Kaseya 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.

Updated under an hour ago (2026-10-19 08:40 UTC)

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It affects kaseya virtual_system_administrator. Add what you run to find out whether that includes you.

CISA lists it as known exploited since Apr 13, 2022; federal agencies had to remediate by May 4, 2022, and it is known to be used in ransomware. Treat that date as your deadline.

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Every CVE for kaseya virtual_system_administrator

Exploited in the last 30 days

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.

CVSS: 9.8 CRITICAL (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Added to CISA KEV Apr 13, 2022; federal remediation due May 4, 2022; known ransomware useApply updates per vendor instructions.
EPSS (exploitation in the next 30 days): 29.55% (percentile 98)
Assigned by: mitre
NVD analysis: Analyzed
Record last updated: Aug 13, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

kaseya virtual_system_administrator kaseya:virtual_system_administrator	from 9.3 before 9.3.0.35; from 9.4 before 9.4.0.36; from 9.5 before 9.5.0.5	NVD

References

https://blog.huntresslabs.com/deep-dive-kaseya-vsa-mining-payload-c0ac839a0e88x-refsource-misc, exploit, third-party-advisory
https://helpdesk.kaseya.com/hc/en-gb/articles/360000333152x-refsource-misc, vendor-advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-20753us-government-resource

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.