CVE-2017-11826Microsoft 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…
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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.
CISA lists it as known exploited since Mar 3, 2022; federal agencies had to remediate by Mar 24, 2022. Treat that date as your deadline.
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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
- 7.8 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-119
- Known exploited
- Added to CISA KEV Mar 3, 2022; federal remediation due Mar 24, 2022Apply updates per vendor instructions.
- EPSS (exploitation in the next 30 days)
- 81.33% (percentile 100)
- Assigned by
- microsoft
- NVD analysis
- Analyzed
- Record last updated
- Oct 21, 2025
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Microsoft Corporation Microsoft Office microsoft:office (from the name) | 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, Office Online Server. | CNA record |
microsoft office_compatibility_pack microsoft:office_compatibility_pack | all versions | NVD |
microsoft office_online_server microsoft:office_online_server | 2016 | NVD |
microsoft office_web_apps_server microsoft:office_web_apps_server | 2010; 2013 | NVD |
microsoft office_word_viewer microsoft:office_word_viewer | all versions | NVD |
microsoft sharepoint_enterprise_server microsoft:sharepoint_enterprise_server | 2016 | NVD |
microsoft sharepoint_server microsoft:sharepoint_server | 2010; 2013 | NVD |
microsoft word microsoft:word | 2007; 2010; 2013; 2013; 2016 | NVD |
References
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11826x-refsource-confirm, patch, vendor-advisory
- https://0patch.blogspot.com/2017/11/0patching-pretty-nasty-microsoft-word.htmlx-refsource-misc, exploit
- http://www.securityfocus.com/bid/101219vdb-entry, x-refsource-bid, broken-link, third-party-advisory
- https://www.tarlogic.com/en/blog/exploiting-word-cve-2017-11826/x-refsource-misc, exploit, third-party-advisory
- http://www.securitytracker.com/id/1039541vdb-entry, x-refsource-sectrack, broken-link, third-party-advisory
- https://securingtomorrow.mcafee.com/mcafee-labs/analyzing-microsoft-office-zero-day-exploit-cve-2017-11826-memory-corruption-vulnerability/x-refsource-misc, broken-link, technical-description, third-party-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-11826us-government-resource
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.