November 3, 2021 · Applied Cybernetics Group
CVE-2021-30116 — Kaseya Virtual System/Server Administrator (VSA)
known ransomware use
Kaseya Virtual System/Server Administrator (VSA) Information Disclosure Vulnerability
- Added to KEV
2021-11-03- Federal due date
2021-11-17- Vendor
- Kaseya
- Product
- Virtual System/Server Administrator (VSA)
- EPSS
- 98.1th percentile (score 0.541, as of
2026-06-08) - NVD CVSS v3.1
- —
- Ransomware use
- Known
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2021-30116
CISA short description
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.
Required action
Apply updates per vendor instructions.