What is CVE-2026-70563?

CVE-2026-70563 is a high-severity vulnerability in Microsoft Windows 10 1607, classified under Improper Link Resolution Before File Access. CVSS score: 8.1/10. Published 2026-09-08.

How severe is CVE-2026-70563?

High severity. CVSS v3 base score is 8.1 out of 10.

Vulnerability in Microsoft Windows 10 1607

CVE-2026-70563

Improper link resolution before file access ('link following') in Windows Shell allows an unauthorized attacker to perform spoofing over a network.

Published 2026-09-08 · last modified 2026-09-24.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.008 (57.8th percentile), scored 2026-10-24.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 57.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-59 — Improper Link Resolution Before File Access

References

Windows Shell Spoofing Vulnerability (vendor-advisory, Patch, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-70563?: CVE-2026-70563 is a high-severity vulnerability in Microsoft Windows 10 1607, classified under Improper Link Resolution Before File Access. CVSS score: 8.1/10. Published 2026-09-08.
How severe is CVE-2026-70563?: High severity. CVSS v3 base score is 8.1 out of 10.