CVE-2017-11826

Microsoft Office Remote Code Execution

7.8 HIGHActively exploited (CISA KEV)Public exploitEPSS 81.2%

Published13 Oct 2017
Added to CISA KEV3 Mar 2022
Remediation due24 Mar 2022

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 3.1 breakdown

Attack vectorLocal

Attack complexityLow

Privileges requiredNone

User interactionRequired

ScopeUnchanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Affected products

Microsoft Office Compatibility Packall versions

Microsoft Office Online Server2016

Microsoft Office Web Apps Server2010 · 2013

Microsoft Office Word Viewerall versions

Microsoft SharePoint Enterprise Server2016

Microsoft SharePoint Server2010 · 2013

Microsoft Word2007 · 2010 · 2013 · 2016

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

Patch & vendor advisories

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11826

References

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

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

Frequently asked

Is CVE-2017-11826 being actively exploited?

Yes. CVE-2017-11826 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 3 Mar 2022.

How severe is CVE-2017-11826?

CVE-2017-11826 has a CVSS 3.1 base score of 7.8, rated high. EPSS estimates a 81.2% probability of exploitation.

Which products are affected by CVE-2017-11826?

Affected products include Microsoft Office Compatibility Pack, Microsoft Office Online Server, Microsoft Office Web Apps Server, Microsoft Office Word Viewer, Microsoft SharePoint Enterprise Server, and 2 more.

How do I fix CVE-2017-11826?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2017-11826 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.