Quick answers
- Is CVE-2026-85817 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-85817 being exploited in the wild.
- How severe is CVE-2026-85817?
- High severity, with a CVSS score of 8.8, published 13 October 2026.
- Which products and versions are affected?
- Microsoft Windows PowerShell.
- Is there a fix for CVE-2026-85817?
- 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-2026-85817 attacked?
- It is attacked over the network, in an operating system.
- Am I affected by CVE-2026-85817?
- Check whether you run Microsoft Windows PowerShell. 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 security decision in Windows PowerShell relies on untrusted inputs, allowing an unauthorized network attacker to execute code remotely. The vulnerability likely stems from insufficient validation or sanitization of external input before using it in authorization checks or script execution paths. A fix is available from Microsoft.
Affected products
- Microsoft Windows PowerShell
Timeline
- 2026-10-13: disclosed