# CVE-2018-20753: Kaseya VSA Remote Code Execution Vulnerability

> CVE-2018-20753: Kaseya VSA Remote Code Execution Vulnerability. CVSS 9.8 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2018-20753
Last updated: 2026-08-13T03:55:34Z

- Published: 2019-02-05 05:00 UTC · Updated: 2026-08-13 03:55 UTC · Assigner: mitre
- CVSS: 9.8 (CVSS 3.1) · Severity: Critical · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS: 29.6%, 98th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2022-04-13, federal due date 2022-05-04, ransomware use: Known

## 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.

## CISA required action

Apply updates per vendor instructions.

## Affected vendors and products

- Kaseya: Virtual System/Server Administrator (VSA)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2018-20753)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2018-20753)
- [https://blog.huntresslabs.com/deep-dive-kaseya-vsa-mining-payload-c0ac839a0e88](https://blog.huntresslabs.com/deep-dive-kaseya-vsa-mining-payload-c0ac839a0e88)
- [https://helpdesk.kaseya.com/hc/en-gb/articles/360000333152](https://helpdesk.kaseya.com/hc/en-gb/articles/360000333152)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2018-20753 · Markdown: https://rewindex.com/cve/CVE-2018-20753.md · JSON: https://rewindex.com/api/v1/cves/CVE-2018-20753 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T01:59:18.669Z