How severe is CVE-2017-11826?

CVE-2017-11826 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2017-11826 being actively exploited?

Yes. CVE-2017-11826 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-03-03, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2017-11826?

CVE-2017-11826 primarily affects Microsoft Office Compatibility Pack. In total, 13 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2017-11826?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2017-11826 have an EU (EUVD) identifier?

Yes. CVE-2017-11826 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2017-3426. It is also flagged as exploited in the EUVD (since 2022-03-03).

When was CVE-2017-11826 published?

CVE-2017-11826 was published on 2017-10-13 and last updated on 2026-06-17.

CVE-2017-11826

CVE-2017-11826 is a high-severity vulnerability in Microsoft Office Compatibility Pack with a CVSS 3.x base score of 7.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2022-03-03). The underlying weakness is classified as CWE-119.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 9.3
EPSS exploit prediction: 82% (100th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2022-03-03)
EU (EUVD) id: EUVD-2017-3426
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2022-03-03)
Weakness: CWE-119
Affected product: Microsoft Office Compatibility Pack
Published: 2017-10-13
Last modified: 2026-06-17

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.

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.
How severe is CVE-2017-11826?: CVE-2017-11826 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2017-11826 being actively exploited?: Yes. CVE-2017-11826 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-03-03, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2017-11826?: CVE-2017-11826 primarily affects Microsoft Office Compatibility Pack. In total, 13 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2017-11826?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2017-11826 have an EU (EUVD) identifier?: Yes. CVE-2017-11826 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2017-3426. It is also flagged as exploited in the EUVD (since 2022-03-03).
When was CVE-2017-11826 published?: CVE-2017-11826 was published on 2017-10-13 and last updated on 2026-06-17.

References

Affected products (13)

cpe:2.3:a:microsoft:office_compatibility_pack:-:sp3:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_online_server:2016:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_web_apps_server:2010:sp2:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_web_apps_server:2013:sp1:*:*:*:*:*:*
cpe:2.3:a:microsoft:office_word_viewer:-:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:sharepoint_enterprise_server:2016:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:2010:sp2:*:*:*:*:*:*
cpe:2.3:a:microsoft:sharepoint_server:2013:sp1:*:*:*:*:*:*
cpe:2.3:a:microsoft:word:2007:sp3:*:*:*:*:*:*
cpe:2.3:a:microsoft:word:2010:sp2:*:*:*:*:*:*
cpe:2.3:a:microsoft:word:2013:sp1:*:*:-:*:*:*
cpe:2.3:a:microsoft:word:2013:sp1:*:*:rt:*:*:*
cpe:2.3:a:microsoft:word:2016:*:*:*:*:*:*:*

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