CVE-2017-8509
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".
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 18.2%, higher than 97% of all known CVEs. Patch or mitigate before the next change window.
Description
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 3.0
- 8.8 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 18.24% probability · 97th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Affected
- microsoft/office · microsoft/office compatibility pack · microsoft/office web apps · microsoft/office web apps server · microsoft/onenote · microsoft/sharepoint server · microsoft/word · microsoft/word for mac
- Source
- secure@microsoft.com
EPSS moved from 16.8% on 21 September 2026 to 18.2% on 27 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
References
- http://www.securityfocus.com/bid/98812Third Party Advisory, VDB Entry
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8509Mitigation, Patch, Vendor Advisory
- http://www.securityfocus.com/bid/98812Third Party Advisory, VDB Entry
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8509Mitigation, Patch, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.