Risk Letters

Exploited vulnerability

CVE-2021-30116

TLP:CLEAR

Kaseya Virtual System/Server Administrator (VSA) Information Disclosure Vulnerability

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.

Facts

  • Vendor: Kaseya
  • Product: Virtual System/Server Administrator (VSA)
  • CVSS: 10
  • EPSS (probability of exploitation within 30 days): 85.7 %
  • On CISA's Known Exploited Vulnerabilities list since: 3 November 2021
  • First known exploitation: 3 November 2021
  • Used in ransomware campaigns (per CISA): Yes
  • CISA's deadline for US federal agencies: 17 November 2021
  • Weakness: CWE-522
  • First seen by Risk Letters: 3 November 2021

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Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD