CVE-2026-62692

Heap overflows in Remote Desktop Services are not anomalies — they are a recurring pattern, and CVE-2026-62692 is the latest instance in a lineage that spans multiple CVE cycles. The technical root cause is a bounds calculation error in session marshaling code, likely in RDP parsing paths that handle graphical data between client and server. While CVSS 7.8 correctly captures that local code execution is required, the operational reality in enterprise environments is worse: RDS Gateway and RDWeb deployments expose this component to authenticated remote users who may be low-privilege contractors, BYOD clients, or joint venture partners. The privilege boundary being crossed is not abstract — it separates remote desktop access from session contexts that touch credential stores, admin workstations, and domain resources on the same host. This makes RDS a high-value pivot point for supply chain-style attacks where a compromised low-privilege account escalates through the session layer. The pattern of recurrence across CVE cycles indicates that the code path producing these overflows has not been materially modernized — memory safety initiatives like Rust adoption and /guard:cf have not penetrated the actual RDP parsing topology. The most likely explanation is code that is operationally calcified: considered stable enough that no team owns refactoring it, yet too interconnected to secure through incremental mitigations. Defenders should map which RDS deployment modes are in use — especially RDWeb and RDS Gateway — and treat any RDS instance as a priority target for isolation, given that the class of vulnerability is reliably recurring and the organizational incentives favor continued patching over architectural remediation.

Reviewed through automated stages and approved by a human before publication.