What is CVE-2026-72927?

CVE-2026-72927 is a medium-severity vulnerability in Microsoft Windows 10 1607, classified under Heap-based Buffer Overflow. CVSS score: 6.7/10. Published 2026-09-08.

How severe is CVE-2026-72927?

Medium severity. CVSS v3 base score is 6.7 out of 10.

Buffer overflow in Microsoft Windows 10 1607

CVE-2026-72927

Heap-based buffer overflow in Winsock allows an authorized attacker to elevate privileges locally.

Vulnerability class: Buffer Overflow

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

CVSS v3 metric

CVSS v3 base score 6.7 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.002 (14.7th percentile), scored 2026-10-24.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 15th percentile — 14.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow

References

Winsock Elevation of Privilege Vulnerability (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-72927?: CVE-2026-72927 is a medium-severity vulnerability in Microsoft Windows 10 1607, classified under Heap-based Buffer Overflow. CVSS score: 6.7/10. Published 2026-09-08.
How severe is CVE-2026-72927?: Medium severity. CVSS v3 base score is 6.7 out of 10.