CVE-2026-26143
Microsoft PowerShell Security Feature Bypass Vulnerability
HIGH
7.8
CVSS Score
Published: April 14, 2026 at 04:57 PM UTC
Updated: October 26, 2026 at 09:10 PM UTC
1 product affected across 1 vendorPowerShell
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Severity
HIGH7.8
Exploit prediction
EPSS 0.5%
SSVC
No known exploit
Description
Improper input validation in Microsoft PowerShell allows an unauthorized attacker to bypass a security feature locally.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Affected range stops below 7.4.14, so it looks safe — our inference, not a vendor statement
Affected range stops below 7.5.5, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (1)
Vendor AdvisoryPatch
Source: cverecord
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26143SSVC — Action Prioritization
SSVCNo known exploitNot automatableTotal impact
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
7.8HIGHmicrosoft
Vector?
Quick Info
StatusANALYZED
CWE
CWE-20
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