CVE-2018-20753
Kaseya VSA Remote Code Execution Vulnerability
- Critical 9.8
- Exploited: added to CISA KEV 13 Apr 2022
- Used in ransomware campaigns
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.
Key facts
- Published
- 5 Feb 2019
- Last changed
- 13 Aug 2026
- Assigned by
- mitre
- KEV added
- 13 Apr 2022
- KEV fix due
- 4 May 2022
- Used in ransomware
- Yes, according to CISA
- EPSS
- 29.551% likely to be exploited in the next 30 days, higher than 98.218% of CVEs (scores for 15 Nov 2026)
- SSVC (CISA)
- Exploitation: active; Automatable: yes; Technical impact: total
Severity scores
Each score is shown as its source gave it. They are not averaged or merged.
- 9.8CVSS 3.1, Criticalfrom CISA (ADP container)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
What to do
- Apply updates per vendor instructions.CISA KEV required action
Historical context and remediation
This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.
No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.
Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.
Affected products
| Vendor | Product | Versions |
|---|---|---|
| n/a | n/a |
|
Timeline
- 5 Feb 2019 Published
- 13 Apr 2022 CVE-2018-20753 added to CISA KEV
- 13 Apr 2022 Added to the CISA KEV catalogue