---
title: "CVE-2018-20753: Kaseya VSA RMM before R9.3 9.3.0.35, R9.4… | CubePath"
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…"
language: en
source: https://cubepath.com/security/cve/CVE-2018-20753
---

# CVE-2018-20753: Kaseya VSA RMM before R9.3 9.3.0.35, R9.4… | CubePath

## 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.

Official description from the CVE record, published by mitre. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2018-20753)

## Key data

### CVSS 3.1 Critical 9.8

Score published by CISA-ADP in the CVE record.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

| Metric                 | Value     | What it means                                                                       |
| ---------------------- | --------- | ----------------------------------------------------------------------------------- |
| Attack vector          | Network   | The vulnerable component can be reached over a network, possibly from the Internet. |
| Attack complexity      | Low       | No special conditions are needed. The attack can be repeated at will.               |
| Privileges required    | None      | No account or privileges are needed.                                                |
| User interaction       | None      | No action from any user is needed.                                                  |
| Scope                  | Unchanged | The impact stays within the vulnerable component.                                   |
| Confidentiality impact | High      | Serious or total effect on the secrecy of data.                                     |
| Integrity impact       | High      | Serious or total effect on the trustworthiness of data.                             |
| Availability impact    | High      | Serious or total effect on availability.                                            |

CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at [first.org/cvss](https://www.first.org/cvss/) .

### EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.

Score

0.29551 (29.6% probability)

Percentile

98.2%

Scores of

Nov 10, 2026

Model

v2026.06.15

### CISA Known Exploited Vulnerabilities

This CVE is listed in the CISA KEV catalog.

Name in the catalog

Kaseya VSA Remote Code Execution Vulnerability

Added to the catalog

Apr 13, 2022

Federal due date

May 4, 2022

Ransomware campaigns

Known use

### CISA assessment as of Apr 14, 2022

Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA.

Exploitation

Recorded by CISA as active

Automatable

yes

Technical impact

total

## References

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

- [blog.huntresslabs.com/deep-dive-kaseya-vsa-mining-payload-c…](https://blog.huntresslabs.com/deep-dive-kaseya-vsa-mining-payload-c0ac839a0e88)
- [helpdesk.kaseya.com/hc/en-gb/articles/360000333152](https://helpdesk.kaseya.com/hc/en-gb/articles/360000333152)

## Timeline

1. ID reserved Feb 4, 2019
2. Record published Feb 5, 2019
3. Added to CISA KEV Apr 13, 2022
4. Record last updated Aug 13, 2026

## Look up another CVE

## About CubePath

CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection.

[Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection)

Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:30 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)