CVE-2025-50162 in Windows
Summary
by MITRE • 08/12/2025
Heap-based buffer overflow in Windows Routing and Remote Access Service (RRAS) allows an authorized attacker to execute code over a network.
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Analysis
by VulDB Data Team • 11/22/2025
The vulnerability identified as CVE-2025-50162 represents a critical heap-based buffer overflow within the Windows Routing and Remote Access Service component that enables remote code execution by authenticated attackers. This flaw exists in the RRAS service implementation where improper input validation occurs during processing of network packets or configuration data, creating a condition where attacker-controlled data can overwrite adjacent memory locations in the heap allocation. The vulnerability specifically affects systems running Windows Server operating systems where RRAS functionality is enabled, making it particularly dangerous in enterprise environments where remote access capabilities are commonly deployed.
The technical implementation of this buffer overflow stems from inadequate bounds checking mechanisms within the RRAS service code that handles remote access protocol communications. When legitimate network traffic containing malformed data reaches the service, the insufficient validation allows memory corruption to occur in heap-allocated buffers, potentially enabling attackers to overwrite function pointers, return addresses, or other critical control data structures. This type of vulnerability maps directly to CWE-121 heap-based buffer overflow conditions that are classified under the broader category of memory safety issues in software development practices. The attack vector requires network-level access to the target system, making it suitable for exploitation through network-based attacks that leverage the service's exposed ports and protocols.
The operational impact of this vulnerability extends beyond simple remote code execution capabilities, as it can be leveraged to establish persistent access to compromised systems and potentially escalate privileges within the network environment. Attackers can exploit this vulnerability to gain unauthorized access to remote access services, potentially compromising entire network infrastructures that rely on RRAS for connectivity. The vulnerability's classification under the MITRE ATT&CK framework would likely map to techniques such as T1059 command and script interpreter and T1078 valid accounts, as successful exploitation would typically require legitimate credentials to access the vulnerable service. Organizations utilizing RRAS for VPN connections, remote access, or network routing functions face significant risk from this vulnerability, particularly if these services are exposed to untrusted networks or if default configurations are maintained.
Mitigation strategies for CVE-2025-50162 should prioritize immediate patch deployment from Microsoft as the primary defense mechanism, alongside network segmentation to isolate RRAS services from untrusted networks. Security administrators should implement network access controls to restrict access to RRAS service ports and consider disabling the service entirely if remote access functionality is not required. Additional protective measures include enabling application whitelisting, implementing intrusion detection systems to monitor for suspicious network traffic patterns, and conducting regular security assessments of remote access configurations. The vulnerability's exploitation potential makes it particularly important for organizations to maintain comprehensive incident response procedures and to monitor for signs of compromise through network traffic analysis and system log review activities. Organizations should also consider implementing zero trust network access models that minimize the attack surface of critical services like RRAS and reduce the potential impact of successful exploitation attempts.