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UK Cyber Defence
VulnerabilityAnalyzed

CVE-2021-37415

Zoho ManageEngine ServiceDesk Authentication Bypass Vulnerability

KEVCRITICAL 9.8EPSS 99.8%

Does this matter?

Known to be exploited in the wild (CISA KEV, CISA remediation deadline 15 December 2021). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.

Description

Zoho ManageEngine ServiceDesk Plus before 11302 is vulnerable to authentication bypass that allows a few REST-API URLs without authentication.

CVSS 3.1
9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
99.83% probability · 100th percentile
Public exploits
None in Exploit-DB
CISA KEV
Listed 1 December 2021 · due 15 December 2021
Weakness
CWE-306
Affected
zohocorp/manageengine servicedesk plus
Source
cve@mitre.org
EPSS trend
0%50%100%30 October 2026: 99.83%30 October 202630 October 2026

EPSS 99.8% since 30 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

CISA notes

Apply updates per vendor instructions. https://nvd.nist.gov/vuln/detail/CVE-2021-37415

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.