RCE in Microsoft Powershell
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)
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.004 (27.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 27th percentile — 27.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.000
Affected products
- Microsoft Powershell
- 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)
References
- Microsoft PowerShell Security Feature Bypass Vulnerability (vendor-advisory, patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-70338?
- CVE-2026-70338 is a high-severity vulnerability in Microsoft Powershell, 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.