What is CVE-2026-70575?

CVE-2026-70575 is a medium-severity vulnerability in Microsoft Windows 11 23h2, classified under NULL Pointer Dereference. CVSS score: 5.3/10. Published 2026-09-08.

How severe is CVE-2026-70575?

Medium severity. CVSS v3 base score is 5.3 out of 10.

NULL pointer dereference in Microsoft Windows 11 23h2

CVE-2026-70575

Null pointer dereference in Windows Schannel allows an authorized attacker to deny service over a network.

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

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.010 (61.0th percentile), scored 2026-10-24.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 61st percentile — 61.0% 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: 0.010 · change: +0.001

Affected products

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

Windows Schannel Denial of Service Vulnerability (vendor-advisory, Patch, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-70575?: CVE-2026-70575 is a medium-severity vulnerability in Microsoft Windows 11 23h2, classified under NULL Pointer Dereference. CVSS score: 5.3/10. Published 2026-09-08.
How severe is CVE-2026-70575?: Medium severity. CVSS v3 base score is 5.3 out of 10.