What is CVE-2026-70264?

CVE-2026-70264 is a medium-severity vulnerability in Microsoft Windows Defender, classified under Improper Link Resolution Before File Access. CVSS score: 5.5/10. Published 2026-10-13.

How severe is CVE-2026-70264?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Vulnerability in Microsoft Windows Defender

CVE-2026-70264

Improper link resolution before file access ('link following') in Microsoft Defender allows an authorized attacker to disclose information locally.

Published 2026-10-13 · last modified 2026-10-13.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

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 Defender

Weakness classification (CWE)

CWE-59 — Improper Link Resolution Before File Access

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70264 (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-70264?: CVE-2026-70264 is a medium-severity vulnerability in Microsoft Windows Defender, classified under Improper Link Resolution Before File Access. CVSS score: 5.5/10. Published 2026-10-13.
How severe is CVE-2026-70264?: Medium severity. CVSS v3 base score is 5.5 out of 10.