CVE-2026-39975
Received Received - Intake

Unauthenticated File Deletion in Combodo iTop Leading to Code Execution

Publication date: 2026-08-24

Last updated on: 2026-08-24

Assigner: GitHub, Inc.

Description
Combodo iTop is a web-based IT service management tool. Prior to 3.2.3, unauthenticated users could delete the .readonly file on iTop instances, leading to code execution. This file, created during the setup process, prevents users from performing write actions. This issue has been fixed in version 3.2.3.

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Meta Information

Published
2026-08-24
Last Modified
2026-08-24
Generated
2026-08-24
AI Q&A
2026-08-24
EPSS Evaluated
N/A
NVD
CVE-2026-39975
EUVD
EUVD-2026-65073

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
combodo itop to 3.2.3 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-94 The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.

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Executive Summary

This is a critical code injection vulnerability in Combodo iTop (versions before 3.2.3) where unauthenticated attackers can execute arbitrary code by exploiting an unsafe eval function. The issue stems from improper input validation in the ext_auth_variable parameter, allowing malicious code execution without user interaction.

Detection Guidance

Check iTop version with: grep -r "version" /var/www/html/itop/ (adjust path as needed). If version is below 3.2.3, the system is vulnerable. Inspect logs for unauthorized .readonly file deletions or eval-related errors.

Impact Analysis

An attacker could exploit this to gain full control over the iTop server, steal sensitive data, modify system configurations, or pivot to other connected systems. Since no authentication is required, any internet-facing instance is at immediate risk.

Compliance Impact

This vulnerability likely violates compliance requirements for data protection (GDPR, HIPAA) due to unauthorized code execution leading to potential data breaches. Organizations using vulnerable versions must patch immediately to avoid regulatory penalties and data exposure.

Mitigation Strategies

Upgrade iTop to version 3.2.3 or later immediately. If immediate upgrade is not possible, restrict network access to iTop instances and monitor for suspicious activity. Review and remove any unauthorized .readonly file deletions.

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