Actively exploited · CISA KEV
Actively exploitedCVE-2021-40539
- First PoC
- same day →Metasploit
- 1788 days →First cited attacker
Signals
- Exploited in the wild
- Yesadded 2021-11-03 · due 2021-11-17 · known ransomware use. An observation, not a forecast.
- EPSS · 30-day forecast
- 99%Chance of exploitation in the next 30 days, 100th percentile of all CVEs. A forecast; KEV outranks it.
- CVSS · NVD
- not stated by sourcesNo NVD record yet.
- Internet exposure
- not stated by sourcesNo exposure census on this CVE's dispatches.
Exploits
2 known · links onlyMetasploit1
This module exploits CVE-2021-40539, a REST API authentication bypass vulnerability in ManageEngine ADSelfService Plus, to upload a JAR and execute it as the user running ADSelfService Plus - which is SYSTEM if started as a service.
ruby · seen 2026-10-18
Nuclei1
Zoho ManageEngine ADSelfService Plus version 6113 and prior are vulnerable to a REST API authentication bypass vulnerability that can lead to remote code execution.
yaml · seen 2026-10-18
On the wire
0 dispatchesNo dispatch on our wire has named this CVE yet.
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