CVE-2026-85817 Windows PowerShell - Remote Code Execution

Windows PowerShell contains a remote code execution caused by reliance on untrusted inputs in a security decision, letting unauthorized attackers execute code over a network, exploit requires network access.

CVSS base score 8.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.74% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Remote Code Execution
Impact
Remote Code Execution
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
13 October 2026
Updated
15 October 2026
Weakness
CWE-807

Vendor fix

Update to the latest version of Windows PowerShell.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

← All CVEs