CVE-2017-11940

7.8 highEPSS 21%

High (7.8) in microsoft malware protection engine. EPSS 21% chance of exploitation in the next 30 days.

The Microsoft Malware Protection Engine running on Microsoft Forefront and Microsoft Defender on Windows 7 SP1, Windows 8.1, Windows RT 8.1, Windows 10 Gold, 1511, 1607, and 1703, 1709 and Windows Server 2016, Windows Server, version 1709, Microsoft Exchange Server 2013 and 2016, does not properly scan a specially crafted file leading to remote code execution. aka "Microsoft Malware Protection Engine Remote Code Execution Vulnerability". This is different than CVE-2017-11937.

Severity

CVSS 3.0

7.8 high

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

EPSS: 21% chance of exploitation in the next 30 days; higher than 97% of CVEs (scores of 2026-10-31)
CWE: CWE-119
Published: 2017-12-08
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

microsoft:malware_protection_engine

References

http://www.securityfocus.com/bid/102104
http://www.securitytracker.com/id/1039972
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11940
http://www.securityfocus.com/bid/102104
http://www.securitytracker.com/id/1039972

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