CVE-2026-77906: CWE-122: Heap-based Buffer Overflow in Microsoft Microsoft Visual Studio 2026 version 18.9

This vulnerability (CVE-2026-77906) is a heap-based buffer overflow in Microsoft Visual Studio 2026 version 18.9 that enables remote code execution by an unauthorized attacker. The flaw allows exploitation over a network without requiring privileges, though user interaction is needed. The vulnerability impacts confidentiality, integrity, and availability with high severity. Microsoft has published an official fix to remediate this vulnerability.

Successful exploitation of this vulnerability could allow an attacker to execute arbitrary code remotely, potentially leading to full compromise of the affected system. The vulnerability affects confidentiality, integrity, and availability of the system. No known exploits are currently reported in the wild.

An official fix is available from Microsoft. Users should apply the security update provided by Microsoft for Visual Studio 2026 version 18.9 to remediate this vulnerability. Refer to the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-77906 for detailed patch information and guidance.