Critical severity · published Sep 7, 2021
CVE-2021-40539
Zoho ManageEngine ADSelfService Plus Authentication Bypass Vulnerability
RansomwareIn wildKEV
9.8
CVSS
99%
EPSS
Yes
On KEV
Description
Zoho ManageEngine ADSelfService Plus version 6113 and prior is vulnerable to REST API authentication bypass with resultant remote code execution.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)99.0% · higher than 100% of CVEs
Exploited in the wildYes
CISA KEVListed Nov 3, 2021
Federal remediation dueNov 17, 2021
Ransomware campaign useKnown
Affected products
Which versions
MA
ManageEngine ADSelfService Plus · Zoho
before 6.1; 6.1; 6.1; 6.1; 6.1; 6.1; +4 more · source: NVD, KEV
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-40539
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-40539
CISA KEV catalogue
https://www.cisa.gov/known-exploited-vulnerabilities-catalog
x_refsource_MISC
https://www.manageengine.com
x_refsource_MISC
https://www.manageengine.com/products/self-service-password/kb/how-to-fix-authentication-bypass-vulnerability-in-REST-API.html
x_refsource_MISC
http://packetstormsecurity.com/files/165085/ManageEngine-ADSelfService-Plus-Authentication-Bypass-Code-Execution.html
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