CVE-2025-26677: 
vulnerability analysis and mitigation

CVE-2025-26677 is a Denial of Service vulnerability affecting the Windows Remote Desktop Gateway (RD Gateway) Service, disclosed on May 13, 2025. The vulnerability allows an unauthorized attacker to cause denial of service over a network through uncontrolled resource consumption (Wiz, NVD).

The vulnerability is classified as an Uncontrolled Resource Consumption issue (CWE-400) with a CVSS v3.1 base score of 7.5 (HIGH). The attack vector is network-based (AV:N), with low attack complexity (AC:L), requiring no privileges (PR:N) or user interaction (UI:N). The scope is unchanged (S:U), with no impact on confidentiality (C:N) or integrity (I:N), but high impact on availability (A:H) (NVD, Wiz).

The primary impact of this vulnerability is on system availability, as it allows an unauthorized attacker to cause denial of service conditions in the Remote Desktop Gateway Service over a network. This could potentially disrupt remote access capabilities for organizations relying on RD Gateway services (Wiz).

Microsoft has released patches for this vulnerability as part of their May 2025 Patch Tuesday updates. Organizations are strongly advised to apply these security updates immediately through Windows Update or enterprise management tools to protect against potential exploitation (Wiz).