CVE-2021-40539CISA KEVEPSS p99.9%

CVE-2021-40539Zoho ManageEngine ADSelfService Plus Authentication Bypass Vulnerability

Zoho / ManageEngine

Description

Zoho ManageEngine ADSelfService Plus contains an authentication bypass vulnerability affecting the REST API URLs which allow for remote code execution.

Scoring

EPSS98.96% probability of exploitation · percentile 99.9% · 2026-06-18T12:00:27Z

CISA KEV entry

Added to KEV: 2021-11-03

(incoming)1

TypeTargetConfidenceTier
KEVEntryZoho ManageEngine ADSelfService Plus Authentication Bypass Vulnerabilitykev-cve-2021-405390%live

Related by meaning· 6

Nearest entities by semantic similarity across the cs-graph corpus.

CVE
Zoho ManageEngine ADSelfService Plus Remote Code Execution Vulnerability
CVE
Zoho ManageEngine ServiceDesk Authentication Bypass Vulnerability
CVE
Zoho Desktop Central Authentication Bypass Vulnerability
CVE
CVE-2025-11250
CVE
Zoho ManageEngine ServiceDesk Plus Remote Code Execution Vulnerability
CVE
Zoho ManageEngine Multiple Products Remote Code Execution Vulnerability
Sourced from NVD + CISA KEV + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.