Servers and applications
CVE-2017-8540
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…
Actively exploited: CISA added it to its Known Exploited Vulnerabilities catalog on 3 Mar 2022.
- Severity
- High 7.8
- Published
- 26 May 2017
- Last changed
- 17 Jun 2026
- Added to UpHeron
- 1 Nov 2026
- Exploit chance
- 72% in the next 30 daysHigher than 99% of CVEs. EPSS by FIRST, 11 Nov 2026
- Weakness
- Out-of-bounds write (CWE-787)
- Attack
- Needs local access · No login needed · Needs someone to click or open something
- Attacker can
- Read data · Change data · Take it down
- CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H- Sources
- NVD
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.
Affected software
| Software | Affected versions |
|---|---|
Microsoft Exchange ServerServers and applications · cpe:a:microsoft:exchange_server |
|
Known exploited
- CISA name
- Microsoft Malware Protection Engine Improper Restriction of Operations Vulnerability
- Required action
- Apply updates per vendor instructions.
- Due for US agencies
- 24 Mar 2022
- Used in ransomware
- Not known