LibreOffice Calc can link a cell range to an external data source, and the link is saved in the document. Through such a link a document could open an embedded Firebird database that wrote a file to any location the user could write to. In fixed versions an embedded Firebird database can open or create files only inside its own private directory.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - LibreOffice Calc can link a cell range to an external data source, and the link is saved in the document.
    Through such a link a document could open an embedded Firebird database that wrote a file to any location
    the user could write to. In fixed versions an embedded Firebird database can open or create files only
    inside its own private directory. (CVE-2026-63266)

The remote Debian 13 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-6543 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-6543-1                   security@debian.org     https://www.debian.org/security/                       Moritz Muehlenhoff     October 05, 2026                      https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : libreoffice     CVE ID         : CVE-2026-63266 CVE-2026-63267 CVE-2026-63268                      CVE-2026-63269 CVE-2026-63270 CVE-2026-63277

    Multiple security vulnerabilities were discovered in LibreOffice, which     could result in denial of service, information disclosure or the     execution of arbitrary code if malformed document files are opened.

    For the stable distribution (trixie), these problems have been fixed in     version 4:25.2.3-2+deb13u8.

    We recommend that you upgrade your libreoffice packages.

    For the detailed security status of libreoffice please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/libreoffice

    Further information about Debian Security Advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - LibreOffice Calc can link a cell range to an external data source, and the link is saved in the document.
    Through such a link a document could open an embedded Firebird database that wrote a file to any location     the user could write to. In fixed versions an embedded Firebird database can open or create files only     inside its own private directory. (CVE-2026-63266)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
472920	Echo: libreoffice: security update to 4:25.2.3-2+deb13u8	Tenable Cloud Security	Echo Local Security Checks	Local	medium
472920	Echo: libreoffice: security update to 4:25.2.3-2+deb13u8	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	medium
363010	Debian dsa-6543 : fonts-opensymbol - security update	Nessus	Debian Local Security Checks	Local	high
362960	Linux Distros Unpatched Vulnerability : CVE-2026-63266	Nessus	Misc.	Local	medium

Detections

Analytics

CVE-2026-63266

medium

Tenable Plugins

medium

medium

high

medium