All vulnerabilities
CVE-2026-96303

Microsoft PowerShell Security Feature Bypass Vulnerability

Microsoft PowerShell 7.4
Open in ThreatlineRecord JSON
CVSS
6.5Medium
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.59%Chance of exploitation activity in the next 30 days, higher than 47% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in7.4.21Also 7.5.12, 7.6.8CVE List
Published13 Oct 2026Updated 23 Oct 2026CVE List

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Vendor and government advisories 1

Vendors that say their products are affected, and agencies that issued alerts. Check each for the fixed release of the product you run.

Reports 1

1 outlet mention it. Reports are not confirmation; each links to its source.

Description

Improperly implemented security check for standard in Microsoft PowerShell allows an unauthorized attacker to bypass a security feature over a network.

Text from CVE List

Affected versions 3

  • PowerShell 7.4affected: 7.4.0 before 7.4.21CVE List
  • PowerShell 7.5affected: 7.5.0 before 7.5.12CVE List
  • PowerShell 7.6affected: 7.6.0 before 7.6.8CVE List

References 1