Exploited· due 2022-05-049.8criticalCriticalused in ransomware
CVE-2018-20753
Kaseya Virtual System Administrator
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.
Exploitation status
- CISA has confirmed this is being exploited in the wild. That is an observation of real attacks, not a prediction.
- It is known to have been used in ransomware campaigns.
- US federal civilian agencies are required to remediate it by 2022-05-04. That deadline does not bind private companies, but it is a reasonable benchmark for how urgently CISA views it.
- A vendor advisory or patch reference has been published.
Required action
Apply updates per vendor instructions.
CISA’s wording, unedited.
What the metrics mean
- It is reachable over a network, without needing local access.
- For an attacker who can reach it, no special conditions are needed to exploit it.
- To exploit it, no account is needed.
- Beyond that, no action by a user is required.
Scoring
- CVSS
- 9.8 (v3.1)
- Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H- Assigned by
- cve@mitre.org
Dates
- Published
- 2019-02-05
- Last modified
- 2026-08-13
- Added to KEV
- 2022-04-13
- Remediation due
- 2022-05-04
- Sources
- CISA KEV, NVD
Affected products
- Kaseya Virtual System Administrator9.3 - 9.3.0.35, 9.4 - 9.4.0.36, 9.5 - 9.5.0.5
As listed in the NVD configuration data. Not a statement about your estate.