What is CVE-2017-8611?

CVE-2017-8611 is a medium-severity vulnerability in Microsoft Edge, classified under Improper Input Validation. CVSS score: 6.5/10. Published 2017-07-11.

How severe is CVE-2017-8611?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Improper input validation in Microsoft Edge

CVE-2017-8611

Microsoft Edge on Microsoft Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016 allows remote attackers to spoof web content via a crafted web site, aka "Microsoft Edge Spoofing Vulnerability."

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2017-07-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.115 (95.9th percentile), scored 2026-10-06.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 96th percentile — 95.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.115 · newest: 0.115 · change: 0.000

Affected products

Microsoft Edge
Microsoft Windows 10 — versions 1511, 1607, 1703
Microsoft Corporation Windows 10 Gold, 1511, 1607, And 1703, Server 2016 — versions Microsoft edge

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

www.securityfocus.com/bid/99391 (VDB Entry, Third Party Advisory, vdb-entry)
www.securitytracker.com/id/1038858 (VDB Entry, Third Party Advisory, vdb-entry)
portal.msrc.microsoft.com/en-us/security-guidance/advisory/CVE-2017-8611 (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2017-8611?: CVE-2017-8611 is a medium-severity vulnerability in Microsoft Edge, classified under Improper Input Validation. CVSS score: 6.5/10. Published 2017-07-11.
How severe is CVE-2017-8611?: Medium severity. CVSS v3 base score is 6.5 out of 10.