CVE-2021-40539
Zoho ManageEngine ADSelfService Plus Authentication Bypass Vulnerability
- Published
- Sep 7, 2021
- Updated
- Oct 21, 2025
- Assigning CNA
- mitre
- Evidence observed
- Nov 3, 2021
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HHigh · next 30 days
- Percentile
- 99.9%
- Model date
- Oct 14, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
CISA Known Exploited
This CVE appears in the CISA Known Exploited Vulnerabilities catalog.
Summary
Zoho ManageEngine ADSelfService Plus version 6113 and prior is vulnerable to REST API authentication bypass with resultant remote code execution.
Sources
modules/exploits/windows/http/manageengine_adselfservice_plus_cve_2021_40539.rb
Metasploit Framework modulesDeclared conditions
- platform: Java($.exploit_windows/http/manageengine_adselfservice_plus_cve_2021_40539.platform)
- verification: check_declared($.exploit_windows/http/manageengine_adselfservice_plus_cve_2021_40539.check)
http/cves/2021/CVE-2021-40539.yaml
Nuclei TemplatesDeclared conditions
- network: http($.protocol_keys)
- verification: status,word($.matchers[*].type)
ADSelfService Plus RCE漏洞 检测工具 (二开)
- CVE-2021-40539Exploit
CVE-2021-40539：ADSelfService Plus RCE漏洞
- CVE-2021-40539Exploit
Exploitation code for CVE-2021-40539
CVE-2021-40539 POC
- CVE-2021-40539Exploit
Exploit for CVE-2021-40539: RCE in Zoho ManageEngine ADSelfService Plus. Includes detection script, Fofa search syntax, and webshell deployment for penetration testing.
- APT-BackpackExploit
cve-2019-11510, cve-2019-19781, cve-2020-5902, cve-2021-1497, cve-2021-20090, cve-2021-22006, cve-2021-22205, cve-2021-26084, cve-2021-26855, cve-2021-26857, cve-2021–26857, cve-2021–26858, cve-2021–26865
Responsible use
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