Live › vulnerability › CVE-2017-8540
Go to dashboardThe Microsoft Malware Protection Engine, used by Defender and Forefront on Windows and Exchange, mishandles a specially crafted file and causes memory corruption. An attacker who gets such a file scanned can run code remotely, and CISA lists it as actively exploited.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 19:11 UTC, 3h before NVD. All times on this page are UTC.
Apply updates per vendor instructions.
| Product | Ecosystem | Affected | Fixed in |
|---|---|---|---|
| Microsoft Malware Protection Engine | vendor | – | – |
Check the installed engine version in Microsoft Defender or Windows Security settings and compare it with the fixed engine version in the vendor advisory.
Update the Microsoft Malware Protection Engine and Defender platform to the version in Microsoft's advisory, as CISA directs.
Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
The Microsoft Malware Protection Engine running on Microsoft Forefront and Microsoft Defender on 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, and Windows Server 2016, Microsoft Exchange Server 2013 and 2016, does not properly scan a specially crafted file leading to memory corruption. aka "Microsoft Malware Protection Engine Remote Code Execution Vulnerability", a different vulnerability than CVE-2017-8538 and CVE-2017-8541.
This page as .md · .json · in your agent: get_signal("CVE-2017-8540")
CISA KEV catalog, Creative Commons 0 · EPSS scores by FIRST, used with attribution · NVD data is provided by NIST and is public domain. Posts quoted belong to their authors.