Kaseya flaws being used in attacks

CISA lists 3 flaws in Kaseya products as being used in attacks, most recently on 24 May 2022. All have been used in ransomware.

What to do

1. Update every Kaseya product you use.Install the updates Kaseya offers, on every device, and restart when asked. Each flaw below has a fix or clear advice; that’s one of CISA’s conditions for listing it.
2. If someone looks after IT for you, send them this page.Many of these are in equipment you don’t see: routers, firewalls, servers, the office network. Ask them to confirm each one is fixed, or that you don’t use the product.
3. Check anything else in the lookup.Search any app, company or CVE. Not being on CISA’s list doesn’t mean safe: keep updating either way.

Every flaw, newest first

1. Being used in attacksUsed in ransomwareAdded by CISA on 24 May 2022
   Kaseya Virtual System/Server Administrator (VSA)
   CVE-2017-18362Kaseya VSA SQL Injection Vulnerability
   ConnectWise ManagedITSync integration for Kaseya VSA is vulnerable to unauthenticated remote commands that allow full direct access to the Kaseya VSA database.
   CISA’s required actionThe impacted product is end-of-life and should be disconnected if still in use.
   CVE recordNVD
2. Being used in attacksUsed in ransomwareAdded by CISA on 13 Apr 2022
   Kaseya Virtual System/Server Administrator (VSA)
   CVE-2018-20753Kaseya VSA Remote Code Execution Vulnerability
   Kaseya VSA RMM allows unprivileged remote attackers to execute PowerShell payloads on all managed devices.
   CISA’s required actionApply updates per vendor instructions.
   CVE recordNVD
3. Being used in attacksUsed in ransomwareAdded by CISA on 3 Nov 2021
   Kaseya Virtual System/Server Administrator (VSA)
   CVE-2021-30116Kaseya Virtual System/Server Administrator (VSA) Information Disclosure Vulnerability
   Kaseya Virtual System/Server Administrator (VSA) contains an information disclosure vulnerability allowing an attacker to obtain the sessionId that can be used to execute further attacks against the system.
   CISA’s required actionApply updates per vendor instructions.
   CVE recordNVD

From CISA’s Known Exploited Vulnerabilities catalog, updated 21 Oct 2026 (version 2026.10.21). CISA’s required actions are written for US government agencies. Kaseya on CISA’s site.