# CVE-2026-85805: Microsoft Windows PowerShell security check bypass

Source: https://junglewise.ai/threats/cve-2026-85805-improperly-implemented-security-check-for-standard-in-windows  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-13. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-85805 · Severity: medium · CVSS 6.5 · Published 2026-10-13

Windows PowerShell, a command-line automation tool used widely in enterprise environments, contains a flaw in its security check implementation that allows an attacker to bypass a security feature. An attacker with network access could exploit this to circumvent intended security controls, potentially gaining unauthorized access or executing unintended operations on affected systems.

Technologies: [Microsoft Windows PowerShell](https://junglewise.ai/threats/technologies/windows-powershell). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-85805 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-85805 being exploited in the wild.

**How severe is CVE-2026-85805?** Medium severity, with a CVSS score of 6.5, published 13 October 2026.

**Which products and versions are affected?** Microsoft Windows PowerShell.

**Is there a fix for CVE-2026-85805?** 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-2026-85805 attacked?** It is attacked over the network, in an operating system.

**Am I affected by CVE-2026-85805?** 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

An improperly implemented security check in Windows PowerShell fails to properly validate a security-relevant control, allowing an attacker to bypass the intended protection. The vulnerability is exploitable over the network without requiring prior authentication. A fix is available from Microsoft.

## Affected products

- Microsoft Windows PowerShell

## Timeline

- 2026-10-13: advisory

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85805](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85805)

## Related threats

- [Microsoft Windows PowerShell privilege escalation in execution](https://junglewise.ai/threats/cve-2026-124226-execution-with-unnecessary-privileges-in-windows-powershell)
- [Windows PowerShell code injection vulnerability](https://junglewise.ai/threats/cve-2026-124225-improper-control-of-generation-of-code-code-injection-in-windows)
- [Microsoft Windows PowerShell privilege escalation via symlink following](https://junglewise.ai/threats/cve-2026-124224-improper-link-resolution-before-file-access-link-following-in)
- [Windows PowerShell code injection security feature bypass](https://junglewise.ai/threats/cve-2026-113815-improper-control-of-generation-of-code-code-injection-in-windows)
- [Windows PowerShell untrusted input security decision remote code execution](https://junglewise.ai/threats/cve-2026-85817-reliance-on-untrusted-inputs-in-a-security-decision-in-windows)