Description
Improper input validation in Microsoft PowerShell allows an unauthorized attacker to bypass a security feature locally.
Affected products
microsoft: powershell
References1
- msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26143 Vendor Advisory
Metrics
- CVSS 3.1
-
7.8
HIGH
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 1% percentile: 47 · as of 12 November 2026
- CWE
- CWE-20
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.