Quick answers
- Is CVE-2026-69463 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-69463 being exploited in the wild.
- How severe is CVE-2026-69463?
- Critical severity, with a CVSS score of 9.8, published 8 September 2026.
- Which products and versions are affected?
- Microsoft Windows NTFS <UNKNOWN>.
- Is there a fix for CVE-2026-69463?
- 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-2026-69463 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-69463?
- 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
This is a heap-based buffer overflow vulnerability in the Windows NTFS file system implementation. The vulnerability is remotely exploitable over a network without requiring authentication or user interaction. An attacker can craft a malicious network packet or file system operation to trigger the buffer overflow, leading to arbitrary code execution with the privileges of the NTFS driver (typically kernel-level). The attack vector is network-based, making this a wormable vulnerability with high attack surface. Microsoft has released security updates to address this issue.
Affected products
- Microsoft Windows NTFS <UNKNOWN>
Timeline
- 2026-09-08: disclosed