CVE-2017-8540
Microsoft Malware Protection Engine Improper Restriction of Operations Vulnerability
This vulnerability is in the CISA Known Exploited Vulnerabilities catalog: attackers are using it. If you run Malware Protection Engine, fix it now.
CISA required action: Apply updates per vendor instructions.
US federal civilian agencies must remediate by Mar 24, 2022.
Patch status
Official fix available since
Apply the vendor's update to every affected system. Check the fixed-in versions below where known.
Basis: NVD patch reference
Description
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.
Source: NIST National Vulnerability Database. Official vulnerability data, reproduced as published.
Affected products
| Product | Vendor | Affected versions | Fixed in | Source |
|---|---|---|---|---|
| Exchange Server | Microsoft | 2013; 2016 | — | NVD |
| Malware Protection Engine | Microsoft | >= 1.1.13701.0, < 1.1.13704.0 | 1.1.13704.0 | KEV |
Sources: NVD = NIST National Vulnerability Database; KEV = CISA Known Exploited Vulnerabilities catalog.
Intelligence timeline
Developments from the last 30 days, newest first.
- CVSS scoredUpdateKEV
CVE-2017-8540 scored CVSS 7.8: Microsoft Malware Protection Engine, Microsoft Malware Protection Engine Improper Restriction of Operations Vulnerability
CISA lists this as exploited in the wild. Unpatched Malware Protection Engine systems are exposed to active attacks now.
Basis: NIST National Vulnerability Database
- Patch releasedUpdateKEV
Patch released for CVE-2017-8540: Microsoft Malware Protection Engine, Microsoft Malware Protection Engine Improper Restriction of Operations Vulnerability
An official fix is now available for Microsoft Malware Protection Engine. This vulnerability is being exploited, so apply it promptly.
Basis: NVD patch reference
1 earlier event is available with a subscription. See plans.
Coverage
We have not published a story about this vulnerability yet.