Vulnerability Monitor

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CVE-2017-11940

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.

Security Impact Summary

This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 7.8, requiring local system access to exploit with relatively low complexity though user interaction is required and does not require pre-existing privileges . The vulnerability impacts confidentiality (data exposure), integrity (unauthorized modifications), and availability (service disruption) for affected systems. Impacting 9 products from microsoft, from microsoft, from microsoft and 6 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

First disclosed in 2017, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.

Published

2017-12-08T14:29:00.203

Last Modified

2025-04-20T01:37:25.860

Status

Deferred

Source

[email protected]

Severity

CVSSv3.0: 7.8 (HIGH)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:C/I:C/A:C

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: COMPLETE
Integrity Impact: COMPLETE
Availability Impact: COMPLETE

Exploitability Score

8.6

Impact Score

10.0

Weaknesses

Type: Primary
CWE-119

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	microsoft	malware_protection_engine	≤ 1.1.14306.0	Yes
Application	microsoft	exchange_server	2013	No
Application	microsoft	exchange_server	2016	No
Application	microsoft	forefront_endpoint_protection_2010	-	No
Application	microsoft	windows_defender	-	No
Operating System	microsoft	windows_10	-	No
Operating System	microsoft	windows_10	1511	No
Operating System	microsoft	windows_10	1607	No
Operating System	microsoft	windows_10	1703	No
Operating System	microsoft	windows_10	1709	No
Operating System	microsoft	windows_7	-	No
Operating System	microsoft	windows_8.1	-	No
Operating System	microsoft	windows_rt_8.1	-	No
Operating System	microsoft	windows_server_2016	-	No
Operating System	microsoft	windows_server_2016	1709	No

References

http://www.securityfocus.com/bid/102104 Third Party Advisory, VDB Entry ([email protected])
http://www.securitytracker.com/id/1039972 Third Party Advisory, VDB Entry ([email protected])
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11940 Patch, Vendor Advisory ([email protected])
http://www.securityfocus.com/bid/102104 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
http://www.securitytracker.com/id/1039972 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11940 Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For microsoft's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.