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CISA Known Exploited Vulnerability

This CVE is actively exploited in the wild. CISA mandates federal agencies to patch immediately.

CVE

CVE-2021-40539

9.8

CVSScritical

Exploitable remotely over the internet · no authentication required.

Description

Zoho ManageEngine ADSelfService Plus version 6113 and prior is vulnerable to REST API authentication bypass with resultant remote code execution.

Attack Vector

Network

Privileges Req.

None

User Interaction

None

Updated Oct 12, 2026View on NVD →

S4E scanner

CVE-2021-40539 Scanner

Targets the REST API endpoint in ADSelfService Plus 6113 and prior; attacker bypasses authentication to execute arbitrary code remotely.

Used 2.4k times · 3.4k assets checked · domain, ipv4, subdomain

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