CVE-2026-63277 LibreOffice Calc - Remote Code Execution

LibreOffice Calc contains a remote code execution vulnerability caused by loading a Java database driver from a remote location via external data source links, letting attackers execute Java code remotely, exploit requires opening a crafted document.

CVSS base score 8.5 /10
High
CISA KEV
Not listed
Public exploit
Proof of concept available
Authentication
Not required
EPSS
0.15% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Remote Code Execution
Impact
Remote Code Execution
CVSS vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published
5 October 2026
Updated
15 October 2026
Weakness
CWE-829

Vendor fix

Update to the fixed versions where Java class path entries must be file URLs or upgrade to the latest version.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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