What is CVE-2017-8522?

CVE-2017-8522 is a high-severity vulnerability in Microsoft Edge, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.5/10. Published 2017-06-15.

How severe is CVE-2017-8522?

High severity. CVSS v3 base score is 7.5 out of 10.

Buffer overflow in Microsoft Edge

CVE-2017-8522

Microsoft browsers in Microsoft Windows 8.1 and Windows RT 8.1, Windows Server 2012 and R2, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016 allow an allow an attacker to execute arbitrary code in the context of the current user when the JavaScript engines fail to render when handling objects in memory in Microsoft browsers, aka "Scripting Engine Memory Corruption Vulnerability". This CVE ID is unique from CVE-2017-8517 and CVE-2017-8524.

Vulnerability class: Buffer Overflow

Published 2017-06-15 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.082 (94.7th percentile), scored 2026-10-06.

Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 94.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.082 · newest: 0.082 · change: 0.000

Affected products

Microsoft Edge
Microsoft Internet Explorer — versions 11, 10
Microsoft Windows 10 — versions 1511, 1607, 1703
Microsoft Windows 8.1
Microsoft Windows Rt 8.1
Microsoft Windows Server 2012 — versions r2
Microsoft Windows Server 2016
Microsoft Corporation Browsers — versions Microsoft Windows 8.1 and Windows RT 8.1, Windows Server 2012 and R2, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016.

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

References

portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8522 (Patch, Vendor Advisory)
www.securityfocus.com/bid/98926 (VDB Entry, Third Party Advisory, vdb-entry)
www.securitytracker.com/id/1038673 (VDB Entry, Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2017-8522?: CVE-2017-8522 is a high-severity vulnerability in Microsoft Edge, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.5/10. Published 2017-06-15.
How severe is CVE-2017-8522?: High severity. CVSS v3 base score is 7.5 out of 10.