What is CVE-2021-41833?

CVE-2021-41833 is a critical-severity vulnerability in Zohocorp Manageengine Patch Connect Plus, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2021-11-11.

How severe is CVE-2021-41833?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Arbitrary file upload in Zohocorp Manageengine Patch Connect Plus

CVE-2021-41833

Zoho ManageEngine Patch Connect Plus before 90099 is vulnerable to unauthenticated remote code execution.

Vulnerability class: Unrestricted File Upload

Published 2021-11-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.080 (94.6th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 94.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.078 · newest: 0.080 · change: +0.003

Affected products

Zohocorp Manageengine Patch Connect Plus — versions 9.0.0

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

pitstop.manageengine.com/portal/en/community/topic/unauthenticated-remote-code-… (Patch, Vendor Advisory)
www.manageengine.com/sccm-third-party-patch-management/kb/unauthenticated-remot… (Vendor Advisory)

Frequently asked questions

What is CVE-2021-41833?: CVE-2021-41833 is a critical-severity vulnerability in Zohocorp Manageengine Patch Connect Plus, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2021-11-11.
How severe is CVE-2021-41833?: Critical severity. CVSS v3 base score is 9.8 out of 10.