CVE-2017-8509A remote code execution vulnerability exists in Microsoft Office when the software fails to properly handle objects in memory, aka "Office Remote Code Execution Vulnerability".
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It affects Microsoft Corporation Microsoft Office and 7 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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A remote code execution vulnerability exists in Microsoft Office when the software fails to properly handle objects in memory, aka "Office Remote Code Execution Vulnerability". This CVE ID is unique from CVE-2017-8510, CVE-2017-8511, CVE-2017-8512, CVE-2017-0260, and CVE-2017-8506.
- CVSS
- 8.8 HIGH (v3.0, NVD)CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- microsoft
- NVD analysis
- Modified
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 15, 2026
Affected products
Microsoft Corporation Microsoft Office microsoft:office (from the name) | Microsoft Office 2007 Service Pack 3, Microsoft Office Compatibility Pack Service Pack 3, Microsoft Word 2007, Microsoft Office 2010 Service Pack 2, Microsoft Word 2010 Service Pack 2, Microsoft Office 2013 Service Pack 1, Microsoft Office 2016, Microsoft Office Web Apps 2010 Service Pack 2, Microsoft Office Web Apps Server 2013 Service Pack 1, Microsoft Word 2013 RT Service Pack 1, Microsoft OneNote 2010 Service Pack 2, Microsoft SharePoint Enterprise Server 2013 Service Pack 1, Microsoft SharePoint Enterprise Server 2016, and Microsoft Word 2016 | CNA record |
microsoft office microsoft:office | 2007; 2010; 2013; 2016 | NVD |
microsoft office_compatibility_pack microsoft:office_compatibility_pack | all versions | NVD |
microsoft office_web_apps microsoft:office_web_apps | 2010 | NVD |
microsoft office_web_apps_server microsoft:office_web_apps_server | 2013 | NVD |
microsoft onenote microsoft:onenote | 2010 | NVD |
microsoft sharepoint_server microsoft:sharepoint_server | 2010; 2013; 2016 | NVD |
microsoft word microsoft:word | 2007; 2010; 2013; 2013; 2016 | NVD |
microsoft word_for_mac microsoft:word_for_mac | 2016 | NVD |
References
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8509x-refsource-confirm, mitigation, patch, vendor-advisory
- http://www.securityfocus.com/bid/98812vdb-entry, x-refsource-bid, third-party-advisory
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.