CVE-2021-30116

CRITICALCVSS 10.0Known Exploited

CISA Known Exploited Vulnerability

https://nvd.nist.gov/vuln/detail/CVE-2021-30116

Remediation deadline: November 17, 2021

Ransomware use: Known

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.

Timeline

Published:July 9th, 2021 2:15 PM

Last modified:August 14th, 2026 5:16 AM

Added to KEV:November 3rd, 2021

CVSS Scoring

CVSS v3: 10.0 (CRITICAL)

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

CVSS v2: 7.5

Affected Software

From NVD CPE configuration data

Vendors

kaseya

Products

vsa_agentvsa_server

Weaknesses (CWE)

CWE-522

References & Reports

Advisories, patches, and third-party reports

https://csirt.divd.nl/2021/07/04/Kaseya-Case-Update-2/Third Party Advisory
https://csirt.divd.nl/2021/07/07/Kaseya-Limited-Disclosure/Third Party Advisory
https://helpdesk.kaseya.com/hc/en-gb/articles/4403440684689-Important-Notice-July-2nd-2021Vendor Advisory
https://www.secpod.com/blog/kaseya-vsa-zero-day-by-revil/Exploit
https://csirt.divd.nl/2021/07/04/Kaseya-Case-Update-2/Third Party Advisory
https://csirt.divd.nl/2021/07/07/Kaseya-Limited-Disclosure/Third Party Advisory
https://helpdesk.kaseya.com/hc/en-gb/articles/4403440684689-Important-Notice-July-2nd-2021Vendor Advisory
https://www.secpod.com/blog/kaseya-vsa-zero-day-by-revil/Exploit
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30116US Government Resource

Source: NIST NVD · Data may lag official sources by up to one minute