CVE Intel / CVE-2021-40539
CVE-2021-40539
manageengine adselfservice plus · zohocorp
What it is
Zoho ManageEngine ADSelfService Plus version 6113 and prior is vulnerable to REST API authentication bypass with resultant remote code execution.
Live exploitation on the huntback network (30 days)
8
attempts captured
2
distinct source IPs
2026-09-15
last seen
huntback carries a network signature for this CVE. Exploitation attempts are detected on the decoy fleet in real time.
How huntback helps
Deploy a decoy that emulates manageengine adselfservice plus and you will see every attempt at this CVE the moment it lands, with the full payload, the attacker's infrastructure, and any stage-2 loader. Then huntback can scan the attacker back.
CVSSn/a Critical
EPSS0.99 (98% pct)
In CISA KEVyes
Publishedn/a
Network detectableyes, signatured