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CVE-2017-8521

27
FAUCET Score

CVE-2017-8521 is a scripting engine memory corruption vulnerability affecting Microsoft Edge in Windows 10 version 1703. This flaw allows an attacker to execute arbitrary code in the context of the current user due to improper handling of objects in memory. With a CVSS score of 7.5 (High), it requires user interaction (e.g., clicking a malicious link) and has a high impact on confidentiality, integrity, and availability. There is no public exploit code available, nor is it listed on the KEV catalog, indicating it is not actively exploited in the wild. Community discussion and media coverage for this CVE are minimal.

Impacted Technologies

VendorProductVersion(s)CPE
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:a:microsoft:edge:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.6
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
6.23%
Probability of exploitation in next 30 days
EPSS Percentile
92.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0623 is in the 60th percentile among its peer group of 1,572 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.4 Bluesky, 0.2 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.6 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (5)

microsoftpatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: 10724-10951
View patch
microsoftpatch availablevia msrc
Product: 10724-10952
View patch
microsoftpatch availablevia msrc
Product: Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1703 for 32-bit Systems
View patch
microsoftpatch availablevia msrc
Product: Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1703 for x64-based Systems
View patch

Vendor Advisories (1)

microsoft2017-Jun/CVE-2017-8521Important

Microsoft Edge Memory Corruption Vulnerability

Jun 13, 2017

References

portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2017-8521
PatchVendor Advisory
securityfocus.com / bid/98925
Third Party AdvisoryVDB Entry