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PatchSiren cyber security CVE debrief

CVE-2026-40877 Combodo CVE debrief

CVE-2026-40877 is a PHP object injection vulnerability in Combodo iTop's user preference functionality, potentially leading to remote code execution. This issue was fixed in version 3.2.3. The vulnerability exists in the user preference functionality of Combodo iTop, which could allow an attacker to inject malicious PHP objects, potentially leading to remote code execution. The fix was implemented in version 3.2.3, and users are advised to update to this version or later to mitigate the vulnerability.

Vendor
Combodo
Product
iTop
CVSS
HIGH 8.7
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-24
Original CVE updated
2026-09-09
Advisory published
2026-08-24
Advisory updated
2026-09-09

Who should care

IT service management teams using Combodo iTop should verify their instance's version and apply the patch to prevent potential remote code execution.

Why it matters

CVE-2026-40877 is a high-severity vulnerability in Combodo iTop that requires immediate attention from IT service management teams to prevent potential remote code execution.

  • Potential remote code execution requires immediate patching and verification of exposure.
  • Restrict access to the user preference functionality to minimize potential exposure.
  • Monitor for suspicious activity related to the user preference functionality.

Technical summary

CVE-2026-40877 is a PHP object injection vulnerability in the user preference functionality of Combodo iTop. This issue can potentially lead to remote code execution and was fixed in version 3.2.3. The vulnerability allows an attacker to inject malicious PHP objects, which could lead to remote code execution. The issue was addressed in version 3.2.3, and defenders should prioritize verifying exposure and applying the patch.

Defensive priority

Defenders should prioritize verifying exposure and applying the patch due to the potential for remote code execution.

Recommended defensive actions

  • Verify if the Combodo iTop instance is vulnerable by checking the version and applying the patch to version 3.2.3 or later.
  • Restrict access to the user preference functionality to minimize potential exposure.
  • Monitor for any suspicious activity related to the user preference functionality.

Evidence notes

The CVE record and NVD entry provide details on the vulnerability and its fix. However, additional information on exploitation or impact is limited. The vulnerability was disclosed by [email protected], and the CVE Program and NVD have documented the issue. There is no evidence of public exploitation, but defenders should verify exposure and apply the patch due to the potential for remote code execution. The CVE record and NVD entry provide details on the vulnerability and

Sources and references

Verified primary and authoritative sources

  • CVE-2026-40877 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-40877

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-40877 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-40877

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.