CVE-2026-39975Network attack vector

Remote code execution via unsafe ext_auth_variable evaluation

Published Aug 24, 2026 · Updated Aug 24, 2026

Code injection in Combodo iTop before 3.2.3 allows remote authenticated users to execute arbitrary code through ext_auth_variable. Config::GetExternalAuthenticationVariable passes the configured expression to eval without restricting it to expected superglobal lookups. Exploitation requires high-privilege access to modify iTop configuration; successful code runs in the server's PHP process.

CVSS severity9.4
Critical
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in Combodo iTop before 3.2.3 allows remote authenticated users to execute arbitrary code through ext_auth_variable. Config::GetExternalAuthenticationVariable passes the configured expression to eval without restricting it to expected superglobal lookups. Exploitation requires high-privilege access to modify iTop configuration; successful code runs in the server's PHP process.

The record

CVE
CVE-2026-39975
Published
Aug 24, 2026
Updated
Aug 24, 2026
Vendor
Combodo
Product
iTop
Classifications
CWE-95, CWE-94, T1059
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Aug 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 24, 2026Record 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=< 3.2.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Combodo · iTopversion=< 3.2.3

Published CVSS scores

9.4GitHub Security AdvisoryCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

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.

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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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-95Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')
CWE-94Improper Control of Generation of Code ('Code Injection')
T1059Command and Scripting Interpreter

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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