CVE-2025-27487: microsoft remote_desktop_client Heap-based Buffer Overflow

Vulnerability summary

CVE-2025-27487 is a high (CVSS 8.0) Heap-based Buffer Overflow vulnerability in microsoft remote_desktop_client. EPSS estimates a 1.49% chance of exploitation in the next 30 days, higher than 73.7% of scored vulnerabilities.

Timeline

1. 08-04-2025
   PublishedVulnerability first disclosed.
2. 10-08-2026
   Last modifiedVulnerability information updated.

Description

Heap-based buffer overflow in Remote Desktop Client allows an authorized attacker to execute code over a network.

• 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-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.