CVE-2026-68875: Microsoft Windows NTFS buffer over-read

CVE-2026-68875 · Severity: high · CVSS 7.8 · Published 2026-09-08

Windows NTFS is the default file system used by billions of Windows computers to store and manage files. A buffer over-read vulnerability allows a locally authenticated attacker to read sensitive memory contents and potentially execute code with system-level privileges, compromising the entire computer.

Technologies: Microsoft Windows NTFS. Vendors: Microsoft.

Quick answers

Is CVE-2026-68875 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-68875 being exploited in the wild.
How severe is CVE-2026-68875?
High severity, with a CVSS score of 7.8, published 8 September 2026.
Which products and versions are affected?
Microsoft Windows NTFS <UNKNOWN>.
Is there a fix for CVE-2026-68875?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-68875 attacked?
It is attacked with local access.
Am I affected by CVE-2026-68875?
Check whether you run Microsoft Windows NTFS at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A buffer over-read vulnerability exists in the Windows NTFS file system driver, where insufficient bounds checking allows an attacker to read data beyond the intended buffer boundary. The vulnerability requires local authentication and file system access to trigger. An attacker with local system access can exploit this flaw to leak kernel memory contents or escalate privileges, potentially achieving arbitrary code execution in the kernel context. Patches are available through Microsoft Security Updates.

Affected products

  • Microsoft Windows NTFS <UNKNOWN>

Timeline

  • 2026-09-08: disclosed

References

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