CVE-2023-33133: microsoft 365_apps Heap-based Buffer Overflow

Vulnerability summary

CVE-2023-33133 is a high (CVSS 7.8) Heap-based Buffer Overflow vulnerability in microsoft 365_apps. EPSS estimates a 44.05% chance of exploitation in the next 30 days, higher than 98.7% of scored vulnerabilities.

Timeline

1. 13-06-2023
   PublishedVulnerability first disclosed.
2. 04-11-2025
   Last modifiedVulnerability information updated.

Description

Microsoft Excel Remote Code Execution Vulnerability

• CWE-122Heap-based Buffer OverflowA heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().