CVE-2017-11826

Name: CVE-2017-11826
Creator: NVD / NIST
Published: 2017-10-13T13:29:02.067+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10Actively ExploitedEPSS 81.63%

Last modified Jun 17, 2026

CVE-2017-11826 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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.. CISA has confirmed active exploitation in the wild. EPSS estimates a 81.63% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Probability

81.63%

99.6th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Mar 24, 2022.

Weakness Enumeration

Affected Software

Vendor	Product	Versions	Update
Microsoft	Office Compatibility Pack	All versions	Sp3
Microsoft	Office Online Server	2016	—
Microsoft	Office Web Apps Server	2010	Sp2
Microsoft	Office Web Apps Server	2013	Sp1
Microsoft	Office Word Viewer	All versions	—
Microsoft	Sharepoint Enterprise Server	2016	—
Microsoft	Sharepoint Server	2010	Sp2
Microsoft	Sharepoint Server	2013	Sp1
Microsoft	Word	2007	Sp3
Microsoft	Word	2010	Sp2
Microsoft	Word	2013	Sp1
Microsoft	Word	2016	—

References

http://www.securityfocus.com/bid/101219Broken Link, Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1039541Broken Link, Third Party Advisory, VDB Entry
https://0patch.blogspot.com/2017/11/0patching-pretty-nasty-microsoft-word.htmlExploit
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11826Patch, Vendor Advisory
https://securingtomorrow.mcafee.com/mcafee-labs/analyzing-microsoft-office-zero-day-exploit-cve-2017-11826-memory-corruption-vulnerability/Broken Link, Technical Description, Third Party Advisory
https://www.tarlogic.com/en/blog/exploiting-word-cve-2017-11826/Exploit, Third Party Advisory
http://www.securityfocus.com/bid/101219Broken Link, Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1039541Broken Link, Third Party Advisory, VDB Entry
https://0patch.blogspot.com/2017/11/0patching-pretty-nasty-microsoft-word.htmlExploit
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11826Patch, Vendor Advisory
https://securingtomorrow.mcafee.com/mcafee-labs/analyzing-microsoft-office-zero-day-exploit-cve-2017-11826-memory-corruption-vulnerability/Broken Link, Technical Description, Third Party Advisory
https://www.tarlogic.com/en/blog/exploiting-word-cve-2017-11826/Exploit, Third Party Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-11826US Government Resource

Timeline

Published: Oct 13, 2017
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2017-11826?

How severe is CVE-2017-11826?

CVE-2017-11826 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 81.63% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2017-11826?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-11826?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST