CVEvulnerability

CVE-2018-20753

9.8 CRITICAL Known exploited Published 2019-02-05 Modified 2026-08-13 Official page ↗

CISA Known Exploited Vulnerability

Kaseya VSA Remote Code Execution Vulnerability — Kaseya Virtual System/Server Administrator (VSA)

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

Added to KEV
2022-04-13
Remediation due
2022-05-04
Ransomware use
Known
Required action
Apply updates per vendor instructions.
Notes
https://nvd.nist.gov/vuln/detail/CVE-2018-20753
Status
Analyzed
Published
2019-02-05
Last modified
2026-08-13
Assigner
[email protected]
CVSS 3.1 ([email protected])
9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0 ([email protected])
7.5 HIGH — AV:N/AC:L/Au:N/C:P/I:P/A:P

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.

Affected configurations

• kaseya virtual system administrator (>= 9.3 < 9.3.0.35) • kaseya virtual system administrator (>= 9.4 < 9.4.0.36) • kaseya virtual system administrator (>= 9.5 < 9.5.0.5)

References