What is CVE-2025-62220?

CVE-2025-62220 is a high-severity vulnerability in Microsoft Windows Subsystem For Linux, classified under Heap-based Buffer Overflow. CVSS score: 8.8/10. Published 2025-11-11.

How severe is CVE-2025-62220?

High severity. CVSS v3 base score is 8.8 out of 10.

Buffer overflow in Microsoft Windows Subsystem For Linux

CVE-2025-62220

Heap-based buffer overflow in Windows Subsystem for Linux GUI allows an unauthorized attacker to execute code over a network.

Vulnerability class: Buffer Overflow

Published 2025-11-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.007 (50.1th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 50.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Microsoft Windows Subsystem For Linux
Microsoft Windows Subsystem For Linux Gui — versions 1.0.0

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2025-62220 (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2025-62220?: CVE-2025-62220 is a high-severity vulnerability in Microsoft Windows Subsystem For Linux, classified under Heap-based Buffer Overflow. CVSS score: 8.8/10. Published 2025-11-11.
How severe is CVE-2025-62220?: High severity. CVSS v3 base score is 8.8 out of 10.