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CVE-2017-11826

HIGH
7.8
CVSS Score
Published: October 13, 2017 at 01:00 PM UTC
Updated: June 17, 2026 at 01:02 AM UTC
8 products affected across 1 vendorSharePoint ServerWordOffice Online Server

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Severity
HIGH7.8
Exploitation
CISA KEV
Exploit prediction
EPSS 81%
SSVC
Active

Actively Exploited

CISA Known Exploited Vulnerabilities (KEV) Catalog

EPSS Score81.3%

EPSS (Exploit Prediction Scoring System) estimates a 81.3% chance this CVE is exploited in the wild within the next 30 days — higher than 100% of all CVEs. It complements CVSS: a high EPSS on a mid-severity CVE can still be urgent.

A remote code execution vulnerability exists in Microsoft Office software when the software fails to properly handle objects in memory. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the current user.

Required Action
Apply updates per vendor instructions.
Ransomware Use
Unknown
Added to KEV
Mar 3, 2022
Remediation Due
Mar 24, 2022
1679 days overdue
Notes
https://nvd.nist.gov/vuln/detail/CVE-2017-11826

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.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (7)

VDB Entryx_refsource_BIDBroken LinkThird Party Advisory
Source: [email protected]
http://www.securityfocus.com/bid/101219
VDB Entryx_refsource_SECTRACKBroken LinkThird Party Advisory
Source: [email protected]
http://www.securitytracker.com/id/1039541
x_refsource_MISCExploit
Source: [email protected]
https://0patch.blogspot.com/2017/11/0patching-pretty-nasty-microsoft-word.html
x_refsource_CONFIRMPatchVendor Advisory
Source: [email protected]
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11826
x_refsource_MISCBroken LinkTechnical DescriptionThird Party Advisory
Source: [email protected]
https://securingtomorrow.mcafee.com/mcafee-labs/analyzing-microsoft-office-zero-day-exploit-cve-2017-11826-memory-corruption-vulnerability/
x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://www.tarlogic.com/en/blog/exploiting-word-cve-2017-11826/
US Government Resource
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-11826

SSVC — Action Prioritization

SSVCActiveNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.8HIGHCISA-ADP
Attack Vector
LOCAL
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-119

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