Risk Letters

Exploited vulnerability

CVE-2021-40539

TLP:CLEAR

Zoho ManageEngine ADSelfService Plus Authentication Bypass Vulnerability

Zoho ManageEngine ADSelfService Plus contains an authentication bypass vulnerability affecting the REST API URLs which allow for remote code execution.

Facts

  • Vendor: Zoho
  • Product: ManageEngine
  • CVSS: 9.8
  • EPSS (probability of exploitation within 30 days): 99 %
  • 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-55
  • 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