What is CVE-2026-70338?

CVE-2026-70338 is a high-severity vulnerability in Microsoft Powershell 7.4, classified under Code Injection. CVSS score: 7.8/10. Published 2026-08-11.

How severe is CVE-2026-70338?

High severity. CVSS v3 base score is 7.8 out of 10.

RCE in Microsoft Powershell 7.4

CVE-2026-70338

Improper control of generation of code ('code injection') in Microsoft PowerShell allows an unauthorized attacker to bypass a security feature locally.

Vulnerability class: RCE (Remote Code Execution)

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Microsoft Powershell 7.4 — versions 7.4.0
Microsoft Powershell 7.5 — versions 7.5.0
Microsoft Powershell 7.6 — versions 7.6.0

Weakness classification (CWE)

CWE-94 — Code Injection

References

secure@microsoft.com (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-70338?: CVE-2026-70338 is a high-severity vulnerability in Microsoft Powershell 7.4, classified under Code Injection. CVSS score: 7.8/10. Published 2026-08-11.
How severe is CVE-2026-70338?: High severity. CVSS v3 base score is 7.8 out of 10.