CVE-2015-6922: Kaseya Virtual System Administrator

Critical severity, CVSS 9.8. EPSS: 82.1% chance of exploitation in the next 30 days.

Kaseya Virtual System Administrator (VSA) 7.x before 7.0.0.33, 8.x before 8.0.0.23, 9.0 before 9.0.0.19, and 9.1 before 9.1.0.9 does not properly require authentication, which allows remote attackers to bypass authentication and (1) add an administrative account via crafted request to LocalAuth/setAccount.aspx or (2) write to and execute arbitrary files via a full pathname in the PathData parameter to ConfigTab/uploader.aspx.

Affected products

• Kaseya Virtual System Administrator: from 7.0.0.0, before 7.0.0.33 (fixed in 7.0.0.33); from 8.0.0.0, before 8.0.0.23 (fixed in 8.0.0.23); from 9.0.0.0, before 9.0.0.19 (fixed in 9.0.0.19); from 9.1.0.0, before 9.1.0.9 (fixed in 9.1.0.9)

Published 2020-02-17. Last modified 2026-06-17.