ACTIVELY EXPLOITED
CVE-2021-30116: Kaseya Virtual System/Server Administrator (VSA) Information Disclosure Vulnerability
| Vendor | Kaseya |
|---|---|
| Product | Virtual System/Server Administrator (VSA) |
| Actively exploited | Yes |
| Added to CISA KEV | 3 Nov 2021 |
| CISA federal deadline | 17 Nov 2021 |
| Ransomware use | Known |
| Weakness (CWE) | CWE-522 |
Required action (CISA's text)
Apply updates per vendor instructions.
Description (NVD)
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.
SOURCES
Other Kaseya flaws
- CVE-2017-18362: Kaseya VSA SQL Injection Vulnerability
- CVE-2018-20753: Kaseya VSA Remote Code Execution Vulnerability
Data from NVD, CISA KEV, FIRST EPSS and vendor advisories. Updated 10 Nov 2026.