CVE-2024-21357: 
vulnerability analysis and mitigation

Windows Pragmatic General Multicast (PGM) Remote Code Execution Vulnerability (CVE-2024-21357) is a critical security flaw discovered in Microsoft Windows systems. The vulnerability was first disclosed on February 13, 2024, and affects multiple versions of Windows operating systems. This vulnerability has received a CVSS v3.1 base score of 8.1 (HIGH), with the vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H (NVD).

The vulnerability is classified as CWE-843 (Access of Resource Using Incompatible Type - 'Type Confusion') according to Microsoft's assessment. It features network-based attack vectors (AV:N) with high attack complexity (AC:H), requires no privileges (PR:N), and needs no user interaction (UI:N). The scope is unchanged (S:U), with potential for high impacts on confidentiality, integrity, and availability (C:H/I:H/A:H) (MSRC).

The vulnerability poses significant risks with potential high impacts on system confidentiality, integrity, and availability. If successfully exploited, it could allow attackers to execute remote code on affected systems, potentially leading to complete system compromise (Rapid7).

Microsoft has released security updates to address this vulnerability across multiple affected Windows versions, including Windows 10, Windows 11, and various Windows Server editions. Users are strongly advised to apply the relevant security patches (KB5034763, KB5034765, KB5034766, KB5034767, KB5034768, KB5034769, KB5034770, KB5034774, KB5034819, KB5034830) to mitigate the risk (Rapid7).