CVE-2017-11826: Technical Deep-Dive (Auto Refreshed)

Generated on 2026-04-02T23:25:13.198Z. This file is automatically regenerated every 30 minutes by the CVE AI enrichment job using web sources (NVD, MITRE, CISA KEV, GitHub).

Executive Technical Summary

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.

• Context preserved from previous revision: 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. 1. Use only isolated environments and systems you own or are explicitly authorized to test.

Technical Details

• CVE: CVE-2017-11826
• KEV date added: 2022-03-03
• KEV due date: 2022-03-24
• NVD published: 2017-10-13
• NVD modified: 2025-10-22
• MITRE modified: 2025-10-21
• CVSS base score: 7.8
• CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
• CVSS exploitability score: 1.8
• CVSS impact score: 5.9
• Attack vector: Local
• Attack complexity: Low
• Privileges required: None
• User interaction: Required
• Scope: Unchanged
• Confidentiality impact: High
• Integrity impact: High
• Availability impact: High

Versions and Products Impacted

• microsoft / office compatibility pack
• microsoft / office online server (versions: 2016)
• microsoft / office web apps server (versions: 2010)
• microsoft / office web apps server (versions: 2013)
• microsoft / office word viewer
• microsoft / sharepoint enterprise server (versions: 2016)
• microsoft / sharepoint server (versions: 2010)
• microsoft / sharepoint server (versions: 2013)
• microsoft / word (versions: 2007)
• microsoft / word (versions: 2010)
• microsoft / word (versions: 2013)
• microsoft / word (versions: 2016)
• Microsoft Corporation / Microsoft Office (versions: 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.)

Weakness Classification

• CWE-119
• Remote Code Execution

Repositories for Lab Validation (Public Examples)

• Ostorlab/KEV | stars: 608 | updated: 2026-03-23 | https://github.com/Ostorlab/KEV
  Notes: Ostorlab KEV: One-command to detect most remotely known exploitable vulnerabilities. Sourced from CISA KEV, Google's Tsunami, Ostorlab's Asteroid and Bug Bounty programs.
• houjingyi233/office-exploit-case-study | stars: 385 | updated: 2026-02-14 | https://github.com/houjingyi233/office-exploit-case-study
• thatskriptkid/CVE-2017-11826 | stars: 9 | updated: 2025-04-14 | https://github.com/thatskriptkid/CVE-2017-11826
  Notes: Exploit for CVE-2017-11826

People and Organizations Mentioned

• microsoft
• Office
• Ostorlab
• houjingyi233
• thatskriptkid

Practical Defensive Validation (Authorized Only)

1. Use only isolated environments and systems you own or are explicitly authorized to test.
2. Snapshot infrastructure before validation and preserve baseline logs (EDR, SIEM, OS, app).
3. Use microsoft / office compatibility pack in isolated VM snapshots (vulnerable vs patched) and compare process tree telemetry before/after updates.
4. Validate command-execution prevention policies (AppLocker/WDAC/EDR) with harmless test binaries only.
5. Create SIEM detections for suspicious parent-child chains, encoded command usage, and abnormal service creation.

References

• NVD record: https://nvd.nist.gov/vuln/detail/CVE-2017-11826
• MITRE CVE record: https://www.cve.org/CVERecord?id=CVE-2017-11826
• CISA KEV Catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog
• CISA KEV JSON feed: https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json
• KEV notes: https://nvd.nist.gov/vuln/detail/CVE-2017-11826
• 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/
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-11826
• Repository example: https://github.com/Ostorlab/KEV
• Repository example: https://github.com/houjingyi233/office-exploit-case-study
• Repository example: https://github.com/thatskriptkid/CVE-2017-11826

This content is for defensive security training and authorized validation only.