CVE-2017-8558

Name: CVE-2017-8558
Creator: NVD / NIST
Published: 2017-06-29T13:29:00.283+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 43.59%

Last modified Jun 17, 2026

CVE-2017-8558 is a vulnerability of currently unknown severity. The Microsoft Malware Protection Engine running on Microsoft Forefront and Microsoft Defender on 32-bit versions of Microsoft Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, Windows 10 Gold, 1511, 1607, and 1703 does not properly scan a specially crafted file leading to memory corruption. aka "Microsoft Malware Protection Engine Remote Code Execution Vulnerability".. EPSS estimates a 43.59% chance of exploitation in the next 30 days.

Description

The Microsoft Malware Protection Engine running on Microsoft Forefront and Microsoft Defender on 32-bit versions of Microsoft Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, Windows 10 Gold, 1511, 1607, and 1703 does not properly scan a specially crafted file leading to memory corruption. aka "Microsoft Malware Protection Engine Remote Code Execution Vulnerability".

Metrics

EPSS Probability

43.59%

98.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-119

Affected Software

Vendor	Product	Versions
Microsoft	Windows Defender	All versions
Microsoft	Endpoint Protection	All versions
Microsoft	Forefront Endpoint Protection	All versions
Microsoft	Forefront Endpoint Protection	2010
Microsoft	Security Essentials	All versions
Microsoft	Windows Intune Endpoint Protection	All versions

References

http://www.securityfocus.com/bid/99262Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1038783Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1038784Third Party Advisory, VDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8558Vendor Advisory
https://www.exploit-db.com/exploits/42264/Third Party Advisory, VDB Entry
http://www.securityfocus.com/bid/99262Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1038783Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1038784Third Party Advisory, VDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8558Vendor Advisory
https://www.exploit-db.com/exploits/42264/Third Party Advisory, VDB Entry

Timeline

Published: Jun 29, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-8558?

How severe is CVE-2017-8558?

Severity scoring for CVE-2017-8558 is pending analysis. The EPSS model estimates a 43.59% probability of exploitation in the next 30 days.

How do I fix CVE-2017-8558?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-8558?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST