CVE-2017-8663
Microsoft Outlook 2007 SP3, Outlook 2010 SP2, Outlook 2013 SP1, Outlook 2013 RT SP1, and Outlook 2016 as packaged in Microsoft Office allows a remote code execution vulnerability due to the way Microsoft Outlook parses specially crafted email messages,…
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 20.1%, higher than 97% of all known CVEs. Patch or mitigate before the next change window.
Description
Microsoft Outlook 2007 SP3, Outlook 2010 SP2, Outlook 2013 SP1, Outlook 2013 RT SP1, and Outlook 2016 as packaged in Microsoft Office allows a remote code execution vulnerability due to the way Microsoft Outlook parses specially crafted email messages, aka "Microsoft Office Outlook Memory Corruption Vulnerability"
- CVSS 3.0
- 7.8 HIGHCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 20.08% probability · 97th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-119
- Affected
- microsoft/outlook
- Source
- secure@microsoft.com
EPSS moved from 24.2% on 21 September 2026 to 20.1% 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/100004Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1039011Third Party Advisory, VDB Entry
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8663Patch, Vendor Advisory
- http://www.securityfocus.com/bid/100004Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1039011Third Party Advisory, VDB Entry
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8663Patch, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.