CVE-2017-11826: Microsoft Office Remote Code Execution Vulnerability

Vulnerability summary

CVE-2017-11826 is a high (CVSS 9.3) vulnerability in Microsoft Office. It is known to be exploited: CISA lists it, first on 03-03-2022. EPSS estimates a 81.33% chance of exploitation in the next 30 days, higher than 99.6% of scored vulnerabilities. 2 public exploits are recorded.

Timeline

1. 13-10-2017
   PublishedVulnerability first disclosed.
2. 03-03-2022
   Added to CISA KEVMicrosoft Office Remote Code Execution Vulnerability
3. 24-03-2022
   CISA remediation dueApply updates per vendor instructions.
4. 21-10-2025
   Last modifiedVulnerability information updated.

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.

• CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferThe product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.