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ExploitedIn CISA KEVFix available

CVE-2017-11826

Exploitation confirmed. First attested on 2022-03-03 by CISA-ADP, CISA KEV, GCVE · kevintel.

  • Published2017-10-13
  • WeaknessCWE-119

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2017-10-1313:29CVE publishedNVD
  2. 2022-03-03Listed as exploited by GCVEGCVE
  3. 2022-03-03Exploitation first reportedCISA KEV
  4. 2022-03-03Added to the CISA KEV catalogCISA KEV
  5. 2025-02-1014:43SSVC exploitation set to activeCISA-ADP
  6. 2026-10-2319:23First public proof of conceptPoC-in-GitHub
  7. 2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2017-11826?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2017-11826?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Microsoft word
BranchAffectedFixed in
2007.x= 2007no fix published
2010.x= 2010no fix published
2013.x= 2013no fix published
2016.x= 2016no fix published
Microsoft office web apps server
BranchAffectedFixed in
2010.x= 2010no fix published
2013.x= 2013no fix published
Microsoft sharepoint server
BranchAffectedFixed in
2010.x= 2010no fix published
2013.x= 2013no fix published

4 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

  1. CISA’s required action: Apply updates per vendor instructions.due 2022-03-24

Advisories and patches

Detection

read 2026-10-23 19:23 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
1 repository, unverifiedthatskriptkid/CVE-2017-11826
PoC-in-GitHub

CISA Known Exploited Vulnerability

Date Added
2022-03-03
Patch Due Date
2022-03-24
Ransomware Use
Unknown
Required Action
Apply updates per vendor instructions.

Sources

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
2017-10-13
Last Modified
2026-06-17
NVD status
Analyzed

Frequently asked questions

What is CVE-2017-11826?

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.

Is CVE-2017-11826 actively exploited?

Yes. CVE-2017-11826 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2022-03-24.

What is the CVSS score for CVE-2017-11826?

CVE-2017-11826 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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Same product first, then the same vendor advisory and the same publication week.

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