Quick answers
- Is CVE-2026-119959 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-119959 being exploited in the wild.
- How severe is CVE-2026-119959?
- Medium severity, with a CVSS score of 5.3, published 10 November 2026.
- Which products and versions are affected?
- Microsoft Windows Hyper-V.
- Is there a fix for CVE-2026-119959?
- 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-2026-119959 attacked?
- It is attacked with local access, in an operating system.
- Am I affected by CVE-2026-119959?
- Check whether you run Microsoft Windows Hyper-V. 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
An improper access control vulnerability in Windows Hyper-V allows an authenticated local attacker to perform spoofing attacks against virtualized resources. The vulnerability requires local access and existing authorization on the host system, limiting the attack surface to authenticated users. Exploitation could allow an attacker to assume false identities within the Hyper-V environment.
Affected products
- Microsoft Windows Hyper-V
Timeline
- 2026-11-10: disclosed