CVE-2017-11826
Published 2017-10-13 · Updated 2026-06-17 · Source secure@microsoft.com
Summary
CVE-2017-11826 is a high-severity (CVSS 7.8) vulnerability in Microsoft Office. CISA added it to the Known Exploited Vulnerabilities catalog on March 3, 2022, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by March 24, 2022. CISA does not currently list it as used in ransomware campaigns. Microsoft has 390 vulnerabilities in the KEV catalog, 117 of them linked to ransomware.
All 390 known-exploited Microsoft vulnerabilities →Description
Microsoft Office 2010, SharePoint Enterprise Server 2010, SharePoint Server 2010, Web Applications, Office Web Apps Server 2010 and 2013, Word Viewer, Word 2007, 2010, 2013 and 2016, Word Automation Services, and Office Online Server allow remote code execution when the software fails to properly handle objects in memory.
CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CISA Known-Exploited Vulnerability
Product: Microsoft — Office
Name: Microsoft Office Remote Code Execution Vulnerability
Date added: 2022-03-03 · Due: 2022-03-24
Required action: Apply updates per vendor instructions.
References
- http://www.securityfocus.com/bid/101219
- http://www.securitytracker.com/id/1039541
- https://0patch.blogspot.com/2017/11/0patching-pretty-nasty-microsoft-word.html
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11826
- https://securingtomorrow.mcafee.com/mcafee-labs/analyzing-microsoft-office-zero-day-exploit-cve-2017-11826-memory-corruption-vulnerability/
- https://www.tarlogic.com/en/blog/exploiting-word-cve-2017-11826/
- http://www.securityfocus.com/bid/101219
- http://www.securitytracker.com/id/1039541