CVE-2023-26436
7.1 · HIGHOverview
CVE-2023-26436 is a high-severity vulnerability affecting open-xchange open-xchange_appsuite_backend. It was published on June 20, 2023 and has a CVSS 3.1 base score of 7.1 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
Technical Description
Attackers with access to the "documentconverterws" API were able to inject serialized Java objects, that were not properly checked during deserialization. Access to this API endpoint is restricted to local networks by default. Arbitrary code could be injected that is being executed when processing the request. A check has been introduced to restrict processing of legal and expected classes for this API. We now log a warning in case there are attempts to inject illegal classes. No publicly available exploits are known.
Remediation
Check the references section for vendor advisories and patches from open-xchange. Update open-xchange_appsuite_backend to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| open-xchange | open-xchange_appsuite_backend | >= 0, < 7.10.6 | Affected |
References
Frequently Asked Questions
What is CVE-2023-26436?
CVE-2023-26436 is a high-severity vulnerability affecting open-xchange open-xchange_appsuite_backend. It was published on June 20, 2023 and has a CVSS 3.1 base score of 7.1 (HIGH).
How severe is CVE-2023-26436?
This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2023-26436?
Check the references section for vendor advisories and patches from open-xchange. Update open-xchange_appsuite_backend to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2023-26436?
CyberStrike's AI-powered security agents can automatically detect CVE-2023-26436 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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