All vulnerabilities
CVE-2021-40539

Zoho ManageEngine ADSelfService Plus Authentication Bypass Vulnerability

Zoho ManageEngineApplications & CMS
Open in ThreatlineRecord JSON
CVSS
9.8Critical
ExploitationExploited in the wildAdded to KEV 3 Nov 2021. Known ransomware useCISA KEV
Exploit odds (EPSS)99.0%Chance of exploitation activity in the next 30 days, higher than 99.9% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
Federal deadline17 Nov 2021Remediation due date for US federal agenciesCISA KEV
CISA required actionApply updates per vendor instructions. CISA KEV

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

Timeline

  1. 7 Sep 2021Exploit code publicMetasploit
  2. 7 Sep 2021, 16:06 UTCPublishedCVE List
  3. 3 Nov 2021Added to CISA KEVCISA KEV

Public exploit code and templates 2

  • Exploit moduleManageEngine ADSelfService Plus CVE-2021-40539 7 Sep 2021Metasploit
  • Scanner templateZoho ManageEngine ADSelfService Plus v6113 - Unauthenticated Remote Command ExecutionNuclei

Listed so defenders can prioritize. Threatline links to the source and does not host exploit code.

Description

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

Text from CVE List

Affected versions 1

  • n/aaffected: n/aCVE List

References 4