What is CVE-2026-119906?

CVE-2026-119906 is a high-severity vulnerability in Microsoft Windows Sandbox, classified under OS Command Injection. CVSS score: 7.8/10. Published 2026-11-10.

How severe is CVE-2026-119906?

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

RCE in Microsoft Windows Sandbox

CVE-2026-119906

Improper neutralization of special elements used in an os command ('os command injection') in Windows Sandbox allows an authorized attacker to elevate privileges locally.

Vulnerability class: Command Injection (OS Command Injection)

Published 2026-11-10 · last modified 2026-11-10.

CVSS v3 metric

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

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Microsoft Windows Sandbox

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-119906 (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-119906?: CVE-2026-119906 is a high-severity vulnerability in Microsoft Windows Sandbox, classified under OS Command Injection. CVSS score: 7.8/10. Published 2026-11-10.
How severe is CVE-2026-119906?: High severity. CVSS v3 base score is 7.8 out of 10.