CVE-2025-21178: microsoft microsoft visual studio 2015 update 3 Heap-based Buffer Overflow

Vulnerability summary

CVE-2025-21178 is a high (CVSS 8.8) Heap-based Buffer Overflow vulnerability in microsoft microsoft visual studio 2015 update 3. EPSS estimates a 1.58% chance of exploitation in the next 30 days, higher than 75.1% of scored vulnerabilities.

Timeline

1. 14-01-2025
   PublishedVulnerability first disclosed.
2. 09-06-2026
   Last modifiedVulnerability information updated.

Description

Visual Studio 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().
• CWE-125Out-of-bounds ReadThe product reads data past the end, or before the beginning, of the intended buffer.