CVE-2017-11774: Microsoft Office Outlook Security Feature Bypass Vulnerability

Vulnerability summary

CVE-2017-11774 is a high (CVSS 7.8) vulnerability in Microsoft Office. It is known to be exploited: CISA lists it, first on 03-11-2021. EPSS estimates a 59.63% chance of exploitation in the next 30 days, higher than 99.1% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 13-10-2017
   PublishedVulnerability first disclosed.
2. 03-11-2021
   Added to CISA KEVMicrosoft Office Outlook Security Feature Bypass Vulnerability
3. 03-05-2022
   CISA remediation dueApply updates per vendor instructions.
4. 21-10-2025
   Last modifiedVulnerability information updated.

Description

Microsoft Outlook 2010 SP2, Outlook 2013 SP1 and RT SP1, and Outlook 2016 allow an attacker to execute arbitrary commands, due to how Microsoft Office handles objects in memory, aka "Microsoft Outlook Security Feature Bypass Vulnerability."

• 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.