CVE-2026-64955 — MEDIUM (6.1)

Vulnerability Description

When Microsoft Excel imports a CSV file, it executes cells beginning with certain characters as formulas, giving such CSV files arbitrary execution. Velociraptor fails to sanitize such cells when exporting to CSV from various places such as the GUI, offline collector or data exports. It is not clear if the vulnerability is actually in Microsoft Excel treating a CSV data file as executable content, or if Velociraptor should be sanitizing the data to prevent Excel from executing it. However, since this is such a common use case for Velociraptor we decided to highlight it in an advisory.

CVSS Score

6.1

MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality

HIGH

Integrity

NONE

Availability

NONE

Related Weaknesses (CWE)

CWE-1236

References

http://docs.velociraptor.app/announcements/advisories/cve-2026-64955/

FAQ

What is CVE-2026-64955?

CVE-2026-64955 is a vulnerability with a CVSS score of 6.1 (MEDIUM). When Microsoft Excel imports a CSV file, it executes cells beginning with certain characters as formulas, giving such CSV files arbitrary execution. Velociraptor fails to sanitize such cells when ex...

How severe is CVE-2026-64955?

CVE-2026-64955 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-64955?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.