Security readout for executives and security teams
Plain-English summary
Combodo iTop versions before 3.2.3 contain a critical flaw that can allow code execution after the protective .readonly file is deleted. The supplied description says unauthenticated users can trigger this condition, potentially exposing IT service-management data and the underlying system to compromise.
Executive priority
Treat this as an urgent remediation item because successful exploitation could permit broad system compromise. Prioritize externally reachable instances, upgrade to 3.2.3 or later, and investigate potentially exposed systems. Current sources do not establish active exploitation.
Technical view
The vulnerability is classified as CWE-94 and remote code execution. The supplied description connects attacker-controlled external-authentication data with deletion of the setup-created .readonly file, removing write protections and enabling code execution. However, the CVSS vector states high privileges are required, conflicting with the unauthenticated description.
Likely exposure
Any iTop instance earlier than 3.2.3 is potentially affected. Risk is greatest where the application is reachable by untrusted users. The supplied sources do not define affected configurations, external-authentication prerequisites, or reliable indicators of compromise.
Exploitation context
The bundle reports network reachability, low complexity, no user interaction, and severe confidentiality, integrity, and availability impacts. It marks the CVE as absent from KEV and provides no evidence of active exploitation or public weaponization.
Researcher notes
The supplied narrative says unauthenticated users could delete .readonly, but CVSS 4.0 lists PR:H. This material inconsistency should be resolved against Combodo's advisory before finalizing attack-path assumptions. No exploit mechanics, affected configuration details, or compromise indicators are included in the bundle.
Mitigation direction
- Upgrade affected iTop installations to version 3.2.3 or later.
- Consult Combodo's advisory for deployment-specific remediation and prerequisite details.
- Restrict untrusted network access until affected instances are upgraded.
- Preserve relevant application and system evidence before remediation if compromise is suspected.
Validation and detection
- Inventory every iTop instance and record its exact installed version.
- Confirm all instances earlier than 3.2.3 are upgraded successfully.
- Determine whether affected instances were reachable by unauthenticated or otherwise untrusted users.
- Check Combodo's advisory for authoritative indicators and post-upgrade verification guidance.
- Investigate unexpected changes involving .readonly or unauthorized write activity.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-94: Code execution behavior lookup
Code execution and unsafe deserialization weaknesses often justify reviewing execution behavior and process telemetry. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-39975 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.4 (4.0)
- Known Exploited
- No
- Published
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H——GitHub_MVulnerability scoring details
Base CVSS 4.0 score
9.4CriticalVector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/Combodo/iTop/security/advisories/GHSA-h823-537c-xwfhCVE reference, GitHub_M · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Control of Generation of Code
Improper Control of Generation of Code represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.