CVE-2026-63277High· 8.5▾ MidnightPoC availableLibreOffice Calc can link a cell range to an external data source, and the link is saved in the document. A document could name a Java database driver for such a link to be loaded from a remote location, so opening the document could run…
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 46.8 · likelihood 0.1 · exploitation 12
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Public exploit / PoC code seen in 1 source. Availability, not in-the-wild use.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Exploit-prediction probability, daily snapshots since Oct 7.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
0.1%
1 GitHub repo
0.1% → 0.3%
LibreOffice Calc can link a cell range to an external data source, and the link is saved in the document. A document could name a Java database driver for such a link to be loaded from a remote location, so opening the document could run Java code from that location. In fixed versions an entry in a Java class path has to be a file URL.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-63266Medium· 6.8LibreOffice Calc can link a cell range to an external data source, and the link is saved in the document
CVE-2026-63267Medium· 6.7LibreOffice Calc can link a cell range to an external csv data source, and the link is saved in the document
CVE-2026-63268Medium· 6.7LibreOffice Calc can link a cell range to an external data source, and the link is saved in the document
CVE-2026-63275Medium· 5.4LibreOffice can read CFF fonts, which may be embedded in documents
CVE-2026-63276Medium· 5.4LibreOffice converts CFF fonts to Type 1 when it subsets a font, which happens when a document is exported to PDF, and CFF fonts may be embedded in documents
CVE-2026-63274Medium· 5.4LibreOffice Draw can import PDF documents