CVE-2017-8540The 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…
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It affects Microsoft Corporation Malware Protection Engine and 8 other products. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Mar 3, 2022; federal agencies had to remediate by Mar 24, 2022. Treat that date as your deadline.
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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.
- CVSS
- 7.8 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-787
- Known exploited
- Added to CISA KEV Mar 3, 2022; federal remediation due Mar 24, 2022Apply updates per vendor instructions.
- EPSS (exploitation in the next 30 days)
- 71.87% (percentile 99)
- Assigned by
- microsoft
- NVD analysis
- Analyzed
- Record last updated
- Oct 21, 2025
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Microsoft Corporation Malware Protection Engine microsoft:malware_protection_engine (from the name) | 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. | CNA record |
microsoft malware_protection_engine microsoft:malware_protection_engine | from 1.1.13701.0 before 1.1.13704.0 | NVD |
microsoft endpoint_protection microsoft:endpoint_protection | all versions | NVD |
microsoft exchange_server microsoft:exchange_server | 2013; 2016 | NVD |
microsoft forefront_endpoint_protection microsoft:forefront_endpoint_protection | all versions; 2010 | NVD |
microsoft forefront_security microsoft:forefront_security | all versions | NVD |
microsoft intune_endpoint_protection microsoft:intune_endpoint_protection | all versions | NVD |
microsoft security_essentials microsoft:security_essentials | all versions | NVD |
microsoft system_center_endpoint_protection microsoft:system_center_endpoint_protection | all versions | NVD |
microsoft windows_defender microsoft:windows_defender | all versions | NVD |
References
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8540x-refsource-confirm, mitigation, patch, vendor-advisory
- http://www.securityfocus.com/bid/98703vdb-entry, x-refsource-bid, broken-link, third-party-advisory
- https://www.exploit-db.com/exploits/42088/exploit, x-refsource-exploit-db, third-party-advisory, vdb-entry
- http://www.securitytracker.com/id/1038571vdb-entry, x-refsource-sectrack, broken-link, third-party-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-8540us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.