CVE-2021-21406Network attack vector

Authenticated command execution via injected Graphviz path

Published Jul 21, 2021 · Updated Aug 3, 2024

Command injection in Combodo iTop before 2.7.4 allows remote authenticated users to execute operating-system commands via the Setup Wizard. The Setup Wizard treats the submitted Graphviz executable path as command syntax rather than as a literal executable path. Access to the Setup Wizard is required, and successful injection provides arbitrary command execution on the host.

CVSS severity8.8
High
EPSS probability1.03%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in Combodo iTop before 2.7.4 allows remote authenticated users to execute operating-system commands via the Setup Wizard. The Setup Wizard treats the submitted Graphviz executable path as command syntax rather than as a literal executable path. Access to the Setup Wizard is required, and successful injection provides arbitrary command execution on the host.

The record

CVE
CVE-2021-21406
Published
Jul 21, 2021
Updated
Aug 3, 2024
Vendor
Combodo
Product
iTop
Classifications
CWE-77, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 21, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2.7.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Combodo · iTopversion=< 2.7.4

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.5NIST NVDAV:N/AC:L/Au:S/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
T1059Command and Scripting Interpreter

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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