What is CVE-2021-21406?

CVE-2021-21406 is a medium-severity vulnerability in Combodo Itop, classified under Command Injection. CVSS score: 5.8/10. Published 2021-07-21.

How severe is CVE-2021-21406?

Medium severity. CVSS v3 base score is 5.8 out of 10.

RCE in Combodo Itop

CVE-2021-21406

Combodo iTop is an open source, web based IT Service Management tool. In versions prior to 2.7.4, there is a command injection vulnerability in the Setup Wizard when providing Graphviz executable path. The vulnerability is patched in version 2.7.4 and 3.0.0.

Vulnerability class: Command Injection (OS Command Injection)

Published 2021-07-21 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.010 (62.3th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 62nd percentile — 62.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Combodo Itop — versions < 2.7.4, 2.7.5, 2.7.5-1

Weakness classification (CWE)

CWE-77 — Command Injection

References

github.com/Combodo/iTop/security/advisories/GHSA-pf95-6h7q-q85x (Third Party Advisory)

Frequently asked questions

What is CVE-2021-21406?: CVE-2021-21406 is a medium-severity vulnerability in Combodo Itop, classified under Command Injection. CVSS score: 5.8/10. Published 2021-07-21.
How severe is CVE-2021-21406?: Medium severity. CVSS v3 base score is 5.8 out of 10.