[ CVE-2021-40539 · Published 7 Sep 2021 ]
Zoho ManageEngine ADSelfService Plus Authentication Bypass Vulnerability
Exploited · CISA KEV CVSS 9.8
EPSS 99%Fix available
[ Why it matters ]Priority signals
- Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2021-11-03
- Known to be used in ransomware campaigns
- EPSS: 99% chance of exploitation in the next 30 days (higher than 100% of CVEs)
- Critical severity: CVSS 9.8
[ Description ]Official description
Zoho ManageEngine ADSelfService Plus version 6113 and prior is vulnerable to REST API authentication bypass with resultant remote code execution.
CISA: Zoho ManageEngine ADSelfService Plus contains an authentication bypass vulnerability affecting the REST API URLs which allow for remote code execution.
[ Fixes ]Fixes and patches
CISA required action (US federal deadline 17 Nov 2021): Apply updates per vendor instructions.
- Patch on manageengine.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD
[ References ]References
- packetstormsecurity.com/files/165085/ManageEngine-ADSelfService-Plus-Authentication-Byp…ExploitThird Party AdvisoryVDB Entry
- www.manageengine.comProduct
- www.manageengine.com/products/self-service-password/kb/how-to-fix-authentication-bypass…PatchVendor Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalogUS Government Resource