High severity · published Apr 14, 2026
CVE-2026-26143
Microsoft PowerShell Security Feature Bypass Vulnerability
7.8
CVSS
0.5%
EPSS
No
On KEV
Description
Improper input validation in Microsoft PowerShell allows an unauthorized attacker to bypass a security feature locally.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 45% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
P7
PowerShell 7.4 · Microsoft
7.4.0 before 7.4.14 · source: vendor
P7
PowerShell 7.5 · Microsoft
7.5.0 before 7.5.5 · source: vendor
PO
Powershell · Microsoft
7.4 before 7.4.14; 7.5 before 7.5.5 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-26143
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-26143
Vendor Advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26143
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