CVE-2026-70338

Microsoft PowerShell Security Feature Bypass Vulnerability

At a glance

Severity: HIGH 7.8
EPSS: EPSS 0.36 % · percentile 30 (2026-10-28)
State: PUBLISHED
Published: 2026-08-11
Updated: 2026-10-28
Assigner: microsoft
NVD status: Analyzed

Description

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

Scores

Version	Score	Vector	Scored by
CVSS 3.1	HIGH 7.8	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C	microsoft
CVSS 3.1	HIGH 7.8	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H	NVD · secure@microsoft.com (Secondary)
CVSS 3.1	HIGH 7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	NVD · nvd@nist.gov (Primary)

Weaknesses (CWE)

CWE-94

European references

ENISA EUVD · EUVD-2026-56767
GCVE · GCVE-0-2026-70338

CERT-FR advisories

CERTFR-2026-AVI-1004 — Multiples vulnérabilités dans les produits Microsoft · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

cpe:2.3:a:microsoft:powershell:*:*:*:*:*:*:*:* ≥ 7.4 < 7.4.19.0
cpe:2.3:a:microsoft:powershell:*:*:*:*:*:*:*:* ≥ 7.5 < 7.5.10.0
cpe:2.3:a:microsoft:powershell:*:*:*:*:*:*:*:* ≥ 7.6 < 7.6.5

Affected products

Product	Versions
Microsoft · PowerShell 7.4	affected 7.4.0 < 7.4.19.0
Microsoft · PowerShell 7.5	affected 7.5.0 < 7.5.10.0
Microsoft · PowerShell 7.6	affected 7.6.0 < 7.6.5

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70338

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD