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CVE-2025-64403

8.1 · HIGH

Apache OpenOffice Calc spreadsheet can contain links to other files, in the form of "external data sources".

Published Nov 12, 2025CWE-862EPSS 1.26%

Overview

CVE-2025-64403 is a high-severity vulnerability. It was published on November 12, 2025 and has a CVSS 3.1 base score of 8.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Apache OpenOffice Calc spreadsheet can contain links to other files, in the form of "external data sources". A missing Authorization vulnerability in Apache OpenOffice allowed an attacker to craft a document that would cause such links

to be loaded without prompt.

This issue affects Apache OpenOffice: through 4.1.15.

Users are recommended to upgrade to version 4.1.16, which fixes the issue.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. 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.

References

Reflists.apache.org/thread/t7c6jhvdb00xtgd9vvn7h5sq9f4h5trtRefwww.openoffice.org/security/cves/CVE-2025-64403.htmlRefwww.openwall.com/lists/oss-security/2025/11/11/6

How CyberStrike helps

Frequently asked questions

What is CVE-2025-64403?

CVE-2025-64403 is a high-severity vulnerability. It was published on November 12, 2025 and has a CVSS 3.1 base score of 8.1 (HIGH).

How severe is CVE-2025-64403?

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2025-64403?

Check the references section for vendor advisories, patches, and mitigation guidance. 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-2025-64403?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-64403 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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