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CVE-2021-37415

9.8, critical Known exploited

Zoho ManageEngine ServiceDesk Authentication Bypass Vulnerability

NVD (opens in a new tab) CVE.org (opens in a new tab) CISA KEV catalogue (opens in a new tab)
CVSS
9.8, critical critical CVSS v3.1
EPSS, next 30 days
100% higher than 99.9% of scored CVEs
Exploitation
Confirmed in the wild
Published
1 Sept 20215 years ago

Known exploited

CISA added this to the Known Exploited Vulnerabilities Catalog on 1 Dec 2021. US federal agencies had to remediate by 15 Dec 2021, a deadline that has passed.

Required action. Apply updates per vendor instructions.

Description

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

Details

Vendor
Zoho
Product
Manageengine Servicedesk Plus
Weakness
CWE-306 (opens in a new tab)
Status
Analyzed
Updated
17 Jun 2026
Assigner
cve@mitre.org

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References 3

Other references 3

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other Zoho CVEs

Every Zoho CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2022-47966 Zoho ManageEngine Multiple Products Remote Code Execution Vulnerability KEV EPSS 100% 9.8, critical
  • CVE-2022-35405 Zoho ManageEngine Multiple Products Remote Code Execution Vulnerability KEV EPSS 100% 9.8, critical
  • CVE-2022-28810 Zoho ManageEngine ADSelfService Plus Remote Code Execution Vulnerability KEV EPSS 71% 6.8, medium
  • CVE-2021-44515 Zoho Desktop Central Authentication Bypass Vulnerability KEV EPSS 100% 9.8, critical
  • CVE-2021-44077 Zoho ManageEngine ServiceDesk Plus Remote Code Execution Vulnerability KEV EPSS 93% 9.8, critical
  • CVE-2021-40539 Zoho ManageEngine ADSelfService Plus Authentication Bypass Vulnerability KEV EPSS 99% 9.8, critical
  • CVE-2020-10189 Zoho ManageEngine Desktop Central File Upload Vulnerability KEV EPSS 100% 9.8, critical
  • CVE-2019-8394 Zoho ManageEngine ServiceDesk Plus (SDP) File Upload Vulnerability KEV EPSS 63% 6.5, medium

Beyond this page

Is CVE-2021-37415 in your network?

This page tells you how dangerous CVE-2021-37415 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

CVE-2021-37415 is in the CISA catalogue of exploited vulnerabilities: attackers are already exploiting it.

  • EXYS7600 OCELOT

    Find it before attackers do

    Ocelot scans your network on a schedule and reports every vulnerability it finds by its CVE identifier, with its CVSS score and how many of your hosts are affected. A finding like CVE-2021-37415 comes with the devices to patch.

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  • EXYS7950 KONDRA

    Detect it if it's exploited

    Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.

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Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 17 Oct 2026, not the live upstream state.