CVE-2026-70338ImportantRevised 19 Aug
Microsoft PowerShell Security Feature Bypass Vulnerability
Assessment
Improper control of generation of code ('code injection') in Microsoft PowerShell allows an unauthorized attacker to bypass a security feature locally.
- Severity
- Important
- CVSS base score
- 7.8CVSS:3.1/
AV:L/ AC:L/ PR:N/ UI:R/ S:U/ C:H/ I:H/ A:H/ E:U/ RL:O/ RC:C - Impact
- Security Feature Bypass
- EPSS, next 30 days
- 0.4%Higher than 27.1% of scored CVEs · FIRST model run 26 Sep 2026 · about EPSS
- Exploitability
- Exploitation Less Likely
- Publicly disclosed
- No
- Customer action
- Required: apply the update
- Component
- Microsoft PowerShell
- Weakness
- CWE-94: Improper Control of Generation of Code ('Code Injection')
- Issued by
- Microsoft
- Published
- 11 Aug 2026 · August 2026
- Last revised
- 19 Aug 2026Acknowledgement Updated
Updates that fix it
0 KBsNo KB listed
MSRC lists no downloadable update, which usually means a service-side fix or a release-notes update. Check the MSRC advisory.
Affected products
Developer Tools3 affected products
- PowerShell 7.4
- PowerShell 7.5
- PowerShell 7.6