Exploited CVEs / Zoho / CVE-2019-8394
CVE-2019-8394
Zoho ManageEngine ServiceDesk Plus (SDP) File Upload Vulnerability. Exploitation in the wild is confirmed by CISA, not predicted. Federal agencies were required to remediate by 2022-05-03 (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 vulnerability, Medium severity, CVSS 6.5. Added to the CISA KEV catalog 2021-11-03.
Risk summary
Updated July 27, 2026. Data refreshed on every build from MSRC, CISA KEV, and FIRST EPSS.
Senserva AI Opinion for CVE-2019-8394
Zoho ManageEngine ServiceDesk Plus allows remote users to upload arbitrary files through the login page customization feature, a pre-authentication path that attackers used to plant webshells on help desk servers. ServiceDesk instances hold credentials, asset inventories, and tickets full of internal detail, making them high-value even though the CVSS score is a Medium Severity 6.5. The 64 percent EPSS score shows exploitation interest remains real.
Do this: Upgrade ServiceDesk Plus to a fixed build and inspect its web directories for files uploaded via login page customization.
AI-generated from public data, 2026-07-07. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for CVE-2019-8394
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for CVE-2019-8394
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: 2022-05-03 (past due).
Apply updates per vendor instructions.
Official fix for CVE-2019-8394
The authoritative fix and affected-version list are published by the vendor. Find the ManageEngine advisory on Zoho ManageEngine Security Advisories.
Common questions about CVE-2019-8394
Is CVE-2019-8394 actively exploited?
Yes. CVE-2019-8394 was added to the CISA Known Exploited Vulnerabilities (KEV) catalog on 2021-11-03, which means exploitation in the wild has been confirmed, not predicted. Its EPSS 30-day exploitation probability is 64%.
What is the CISA deadline and required action for CVE-2019-8394?
CISA set the federal (BOD 22-01) remediation due date at 2022-05-03, which has passed; treat any unremediated system as overdue. The verbatim required action: Apply updates per vendor instructions.
What fixes CVE-2019-8394?
The authoritative fix is in the vendor advisory: see Zoho ManageEngine Security Advisories for the patched ManageEngine 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-2019-8394?
Yes. This page includes a free, ready-to-paste AI prompt containing CVE-2019-8394'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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All Zoho exploited CVEs on one page: Zoho vulnerabilities actively exploited.
Authoritative references
Every actively exploited CVE, searchable with due dates and CSV export: the exploited-CVE tracker. The newest additions: exploited this week.
