Quick answers
- Is CVE-2026-69910 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-69910 being exploited in the wild.
- How severe is CVE-2026-69910?
- Critical severity, with a CVSS score of 9.8, published 8 September 2026.
- Which products and versions are affected?
- Microsoft Windows Hyper-V <UNKNOWN>.
- Is there a fix for CVE-2026-69910?
- 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-2026-69910 attacked?
- It is attacked over the network, in an operating system.
- Am I affected by CVE-2026-69910?
- Check whether you run Microsoft Windows Hyper-V 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
The vulnerability is a stack-based buffer overflow in Windows Hyper-V that can be triggered over the network. The flaw allows an unauthenticated attacker to send malicious input that overflows a buffer on the stack, leading to arbitrary code execution. The network-accessible attack vector combined with no authentication requirement means the vulnerability can be exploited by any attacker with network connectivity to the affected system. No public exploitation in the wild has been reported at this time, but patches should be applied immediately given the critical severity.
Affected products
- Microsoft Windows Hyper-V <UNKNOWN>
Timeline
- 2026-09-08: disclosed