How severe is CVE-2021-44526?

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

Vulnerability in Zohocorp Manageengine Servicedesk Plus

CVE-2021-44526

Zoho ManageEngine ServiceDesk Plus before 12003 allows authentication bypass in certain admin configurations.

Published 2021-12-23 · 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: 0.032 (87.6th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 87.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.032 · newest: 0.032 · change: 0.000

Affected products

Zohocorp Manageengine Servicedesk Plus — versions 8.1, 8.2, 9.0

References

www.manageengine.com/products/service-desk/on-premises/readme.html (Vendor Advisory)

Frequently asked questions

What is CVE-2021-44526?: CVE-2021-44526 is a critical-severity vulnerability in Zohocorp Manageengine Servicedesk Plus. CVSS score: 9.8/10. Published 2021-12-23.
How severe is CVE-2021-44526?: Critical severity. CVSS v3 base score is 9.8 out of 10.