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CVE-2026-40058: Falcon sensor for Windows

Severity

8.8 (HIGH)

Vendor

CROWDSTRIKE

Affected versions

8.10.0 through before 8.10.21408; 7.40.0 through before 7.40.21309; 7.39.0 through before 7.39.21113

Patch status

Unknown

Published

2026-09-15T18:17:20.913

Modified

2026-09-15T19:17:18.573

Why it matters

High-severity vulnerability requiring prioritized review.

Recommended admin actions

• Review and patch based on exposure, asset criticality, and business impact.
• Compare installed versions against the affected version range in the advisory.

Technical summary

CrowdStrike released a security update to address a vulnerability in the Falcon sensor for Windows. The vulnerability only exists when the Microsoft Office File Malicious Macro Removal Windows policy setting is enabled and customers remain protected through the Cloud Anti-malware for Microsoft Office Files settings. An update is available immediately for versions 7.34 and above, 7.32 LTS, and 7.16 for Windows 7/2008 R2 systems. The Falcon sensor for Mac, Linux, and Legacy Systems are not affected.  This vulnerability could expose an arbitrary file write to protected locations from an unprivileged context, potentially leading to local privilege escalation. The CrowdStrike Laroux Malware Cleanup Tool, based off of the same feature in the CrowdStrike Falcon sensor for Windows, is also affected. An update for this tool is also available immediately.

View the official NVD record for CVE-2026-40058

CVE data is sourced from NVD/CNA records and optional enrichment. Validate against the vendor advisory before taking production action.