CVE-2026-50445 in Windows
Summary
by MITRE • 07/14/2026
Buffer over-read in Windows RDP allows an unauthorized attacker to disclose information over a network.
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Analysis
by VulDB Data Team • 07/14/2026
This vulnerability represents a critical buffer over-read condition within the Remote Desktop Protocol implementation on windows systems, classified under cwe-125 buffer over-read and potentially related to cwe-787 out-of-bounds read. The flaw occurs when the remote desktop protocol server fails to properly validate input data during authentication or session management processes, specifically within the rdp security layer where client credentials and connection parameters are processed. An attacker exploiting this vulnerability can craft specially crafted network packets that cause the rdp service to read memory locations beyond the bounds of allocated buffers, potentially exposing sensitive information including system memory contents, credential data, or internal process structures. The attack vector requires network access to the target windows system, typically targeting the standard rdp port 3389, and can be executed without authentication credentials initially. This vulnerability directly impacts the confidentiality aspect of the information security triad by enabling unauthorized disclosure of sensitive data that may include user session information, cached credentials, or system memory structures containing privileged data.
The operational impact of this vulnerability extends beyond simple information disclosure to potentially enable further exploitation pathways within the attack chain. When an attacker successfully exploits this buffer over-read condition, they may gain insights into system memory layouts which could facilitate more sophisticated attacks such as heap spraying or return oriented programming techniques. The vulnerability affects multiple windows versions including server and desktop editions, making it particularly dangerous in enterprise environments where rdp services are commonly exposed to external networks. From an att&ck framework perspective, this vulnerability aligns with techniques such as t1071.001 application layer protocol web protocols and t1046 network service scanning, as attackers would need to identify exposed rdp endpoints before attempting exploitation. The timing of the vulnerability disclosure indicates it was likely present in windows systems for an extended period, making it a prime target for automated exploitation tools that scan for exposed rdp services.
Mitigation strategies should focus on immediate network segmentation and access control measures to prevent unauthorized discovery of rdp endpoints, combined with proper system patching procedures. Organizations should implement network level firewalls to restrict access to port 3389 only to trusted ip addresses and consider deploying additional authentication layers such as multi-factor authentication or vpn solutions before rdp access. The vulnerability requires patching at the operating system level through microsoft security updates, with priority given to critical and important severity patches. Additional defensive measures include monitoring for unusual rdp connection patterns, implementing intrusion detection systems to identify crafted packets targeting this specific flaw, and conducting regular vulnerability assessments to ensure all windows systems remain patched against known remote code execution vulnerabilities. System administrators should also consider disabling rdp access where possible or using alternative secure access methods such as ssh or virtual private networks with strong authentication mechanisms.