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A code execution issue in the Java integration in Apache OpenOffice v4.1.16 and earlier ...

Rapid7 • October 3, 2026

A code execution issue in the Java integration in Apache OpenOffice v4.1.16 and earlier allows a crafted untrusted document to trigger executing arbitrary (even remote) code when opened by the user.

This issue is expected to be fixed in version 4.1.17, which is in the release candidate phase.

Until then, users can mitigate this issue by disabling Java runtime integration in the Preferences dialog. This prevents the attack. If this is not possible, or as an extra precaution, you can avoid opening open untrusted files entirely. Once 4.1.17 is released, upgrade to that version to fix the issue.

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The full story

This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

RCE Vulnerability in LibreOffice and OpenOffice Spreadsheets A remote code execution vulnerability has been identified in LibreOffice and Apache OpenOffice, allowing malicious spreadsheets to execute attacker-controlled code without user consent. The flaw, tracked as CVE-2026-63277 for LibreOffice and CVE-2026-59265 for OpenOffice, exploits a feature that enables spreadsheets to link to external data sources. LibreOffice has released patches in versions 26.2.5 and 26.8.0 on October 5, 2026, while OpenOffice has not yet patched the vulnerability in its current version, 4.1.16. Users are advised to disable Java support or avoid untrusted spreadsheets until a fix is available. The vulnerability has been demonstrated in proof-of-concept scenarios, but there are no confirmed reports of exploitation in the wild. The issue affects systems where Java and JDBC support are enabled, particularly on Linux desktops. The risk level for LibreOffice's CVE-2026-63277 is rated as high with a CVSS score of 8.5. 5 sources 71

Extracted Entities

A code execution issue in the Java integration in Apache OpenOffice v4.1.16 and earlier ...

The full story

Extracted Entities

Attack Types (1)

Companies (1)

CWE Weaknesses (1)

MITRE ATT&CK (1)

Platforms (1)