Is CVE-2017-8523 in the CISA KEV catalog?

No. CVE-2017-8523 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2017-8523?

CVE-2017-8523 has a CVSS v3 base score of 4.3 (MEDIUM).

What is the EPSS score for CVE-2017-8523?

CVE-2017-8523 has an EPSS score of 1.37% (68th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix or mitigate CVE-2017-8523?

No published fix for CVE-2017-8523 has been found yet. Check the linked vendor advisories for guidance as it becomes available.

CVE & CISA-KEV Catalog

CVE-2017-8523

MEDIUM

4.3

CVSS v3

NVD

Description

Microsoft Edge in Microsoft Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016 allows an attacker to trick a user into loading a page with malicious content when Microsoft Edge fails to correctly apply Same Origin Policy for HTML elements present in other browser windows, aka "Microsoft Edge Security Feature Bypass Vulnerability". This CVE ID is unique from CVE-2017-8530 and CVE-2017-8555.

CWE-346

How to fix

No published remediation has been found for this vulnerability's affected products yet.

Mitigation guidance may be in the linked vendor advisories in the References section below.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityLow

AvailabilityNone

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Exploit Intelligence

1.37%probability of exploitation in 30 days

68thpercentile

Moderate risk: more likely to be exploited than 68% of all known CVEs.

References

Patch1

portal.msrc.microsoft.com

Third-Party Advisory1

securityfocus.com

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-13.