Exploited CVEs / Zoho / CVE-2021-37415
CVE-2021-37415
Zoho ManageEngine ServiceDesk Authentication Bypass Vulnerability. Exploitation in the wild is confirmed by CISA, not predicted. Federal agencies were required to remediate by 2021-12-15 (that deadline has passed); treat that date as the outer bound for your own environment. The fix is in the vendor advisory: Zoho ManageEngine Security Advisories, linked below.
Actively exploited Zoho ManageEngine ServiceDesk Plus (SDP) vulnerability, Critical severity, CVSS 9.8. Added to the CISA KEV catalog 2021-12-01.
Risk summary
Updated July 27, 2026. Data refreshed on every build from MSRC, CISA KEV, and FIRST EPSS.
Senserva AI Opinion for CVE-2021-37415
Zoho ManageEngine ServiceDesk Plus before build 11302 exposes REST API URLs that skip authentication entirely, a Critical (CVSS 9.8) bypass with a 100% EPSS score. Help desk platforms hold credentials, asset data, and tickets full of internal detail, which makes an unauthenticated door into one a rich prize. Confirmed exploitation put it on CISA's KEV list in December 2021.
Do this: Upgrade ServiceDesk Plus to build 11302 or later and audit API access logs for unauthenticated calls.
AI-generated from public data, 2026-07-07. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for CVE-2021-37415
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for CVE-2021-37415
Published and last-revised dates are authoritative, from Microsoft MSRC (or the CISA KEV date-added). Senserva additionally records day-to-day changes from 2026-07-07, refreshed several times a day; the change count reflects that forward-only tracking.
CISA required action
Federal (BOD 22-01) remediation due date: 2021-12-15 (past due).
Apply updates per vendor instructions.
Official fix for CVE-2021-37415
The authoritative fix and affected-version list are published by the vendor. Find the ManageEngine ServiceDesk Plus (SDP) advisory on Zoho ManageEngine Security Advisories.
Common questions about CVE-2021-37415
Is CVE-2021-37415 actively exploited?
Yes. CVE-2021-37415 was added to the CISA Known Exploited Vulnerabilities (KEV) catalog on 2021-12-01, which means exploitation in the wild has been confirmed, not predicted. Its EPSS 30-day exploitation probability is 100%.
What is the CISA deadline and required action for CVE-2021-37415?
CISA set the federal (BOD 22-01) remediation due date at 2021-12-15, which has passed; treat any unremediated system as overdue. The verbatim required action: Apply updates per vendor instructions.
What fixes CVE-2021-37415?
The authoritative fix is in the vendor advisory: see Zoho ManageEngine Security Advisories for the patched ManageEngine ServiceDesk Plus (SDP) versions and any workarounds. KEV listing makes this a fix-first item: patch it ahead of higher-CVSS issues nobody is exploiting.
Can I ask my own AI about CVE-2021-37415?
Yes. This page includes a free, ready-to-paste AI prompt containing CVE-2021-37415's key facts: severity, CVSS, EPSS, the KEV date, the CISA due date, and the required action. Copy it into Claude, ChatGPT, or Copilot; the data is refreshed twice a day (5 AM and 3 PM US Central).
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Authoritative references
Every actively exploited CVE, searchable with due dates and CSV export: the exploited-CVE tracker. The newest additions: exploited this week.
