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CVE-2021-30116: Kaseya Virtual System/Server Administrator (VSA) Information Disclosure Vulnerability
Kaseya Virtual System/Server Administrator (VSA) · in CISA KEV since 2021-11-03
2021-11-03added to KEV
2021-11-17federal remediation due date
85.73%EPSS exploit probability (30 days) 99.7th percentile
9.8 CRITICALCVSS 3.1
Knownknown ransomware use
117days from NVD publication to KEV
What it is
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 (CISA)
Apply updates per vendor instructions.
| CWE | CWE-522 |
|---|---|
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD published | 2021-07-09 (Analyzed) |
Original records: NVD · CISA KEV · JSON: /api/cve/CVE-2021-30116.json · all KEV CVEs
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Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.