CVE-2021-30116 — Kaseya Virtual System/Server Administrator (VSA) Information Disclosure Vulnerability
Overview
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.
Vulnerability details
- CVE ID
- CVE-2021-30116
- Vulnerability
- Kaseya Virtual System/Server Administrator (VSA) Information Disclosure Vulnerability
- Vendor
- Kaseya
- Affected products
- Kaseya: Virtual System/Server Administrator (VSA)
- Severity
- HIGH
- Exploitation status
- Actively exploited in the wild (CISA KEV)
- Published
- 2021-11-03
Remediation guidance
CVE-2021-30116 is in CISA's Known Exploited Vulnerabilities (KEV) catalog — U.S. federal civilian agencies are required to remediate it under Binding Operational Directive 22-01. Treat it as a priority for every environment.
Apply the vendor's official security update for Kaseya the affected product as soon as possible. Where a patch is unavailable, apply vendor mitigations or isolate/segment exposed systems.
Hunt for indicators of compromise tied to this vulnerability and confirm logging/EDR coverage on affected assets.
Authoritative references
Remediate CVE-2021-30116 — and stay ahead of the next one
CVE-2021-30116 is listed in the CISA KEV catalog as actively exploited — treat remediation as urgent. Scan your domain free to see whether CVE-2021-30116 and other Kaseya issues affect you and get a prioritized remediation report (full report from ₹999) — or stream the full feed of 1,600+ actively-exploited CVEs straight into your SOC.
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