CVE-2025-29832 is a security vulnerability identified as an out-of-bounds read (CWE-125) affecting Microsoft Windows 10 Version 1809, specifically build 10.0.17763.0. The flaw exists within the Windows Routing and Remote Access Service (RRAS), a component responsible for routing network traffic and providing remote access capabilities. An out-of-bounds read occurs when a program reads data past the boundary of allocated memory, potentially exposing sensitive information. In this case, an unauthorized attacker can exploit this vulnerability remotely over the network without requiring privileges, but user interaction is necessary. The vulnerability allows the attacker to disclose information, impacting confidentiality but not integrity or availability. The CVSS v3.1 base score is 6.5 (medium severity), with vector AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C, indicating network attack vector, low attack complexity, no privileges required, user interaction required, unchanged scope, high confidentiality impact, no integrity or availability impact, and official fix is planned. No known exploits are currently observed in the wild. The vulnerability could be leveraged to leak sensitive information from affected systems, potentially aiding further attacks or reconnaissance. Since RRAS is often used in enterprise environments for VPN and routing, exploitation could expose internal network details or credentials if combined with other attack vectors. However, the requirement for user interaction and lack of privilege requirements somewhat limit the attack surface. No patches have been linked yet, so mitigation relies on workarounds or disabling RRAS if not needed.

For European organizations, this vulnerability poses a moderate risk primarily to confidentiality of sensitive data transmitted or processed via RRAS on Windows 10 Version 1809 systems. Enterprises using RRAS for VPN or routing services could have internal network information or credentials exposed, which may facilitate lateral movement or targeted attacks. Given that Windows 10 Version 1809 is an older release, some organizations may still operate legacy systems, especially in critical infrastructure or industrial sectors. Disclosure of sensitive information could lead to espionage, data leaks, or preparation for more severe attacks. However, the lack of integrity or availability impact reduces the risk of direct service disruption. The requirement for user interaction means phishing or social engineering might be needed to trigger the exploit, which aligns with common attack vectors in Europe. Organizations relying on RRAS in regulated sectors (finance, healthcare, government) must be particularly cautious due to compliance and data protection obligations under GDPR.

1. Prioritize upgrading or patching affected Windows 10 Version 1809 systems once Microsoft releases an official fix. Monitor Microsoft security advisories closely. 2. If patching is delayed, consider disabling the Routing and Remote Access Service on affected systems if it is not essential to business operations. 3. Implement network segmentation to isolate RRAS servers and limit exposure to untrusted networks. 4. Employ strict user awareness training to reduce the risk of user interaction exploitation, focusing on phishing and social engineering defenses. 5. Monitor network traffic for unusual RRAS activity or attempts to exploit this vulnerability using intrusion detection systems tuned for RRAS anomalies. 6. Review and harden RRAS configurations to minimize unnecessary services or features that could be leveraged. 7. Maintain an asset inventory to identify all systems running Windows 10 Version 1809 and assess their exposure. 8. Consider upgrading legacy systems to supported Windows versions to reduce exposure to known vulnerabilities.