CVE-2025-63701 is a heap corruption vulnerability identified in the Advantech TP-3250 printer driver, specifically within the DrvUI_x64_ADVANTECH.dll version 0.3.9200.20789. The flaw arises when the Windows API function DocumentPropertiesW() is invoked with a valid dmDriverExtra field but an output buffer smaller than expected. The driver incorrectly assumes the output buffer size matches the input buffer size, leading to out-of-bounds writes and heap corruption (CWE-122). This memory corruption can cause the affected application or driver component to crash, resulting in denial of service. Additionally, the heap corruption may be leveraged to execute arbitrary code in user space, although exploitation requires local access and no elevated privileges or user interaction. The vulnerability has a CVSS v3.1 base score of 6.8, reflecting a medium severity primarily due to its local attack vector and limited confidentiality and integrity impact. No patches or known exploits are currently available, but the vulnerability is publicly disclosed and should be addressed proactively. The issue affects systems running this specific printer driver version, which is typically deployed in industrial or specialized printing environments.

For European organizations, the primary impact is denial of service on systems using the Advantech TP-3250 printer driver, potentially disrupting printing operations critical to business workflows. Although the vulnerability could allow code execution, the requirement for local access limits remote exploitation risks. Confidentiality and integrity impacts are minimal, but availability disruptions could affect operational continuity, especially in manufacturing, logistics, or industrial sectors where Advantech devices are common. Organizations with shared workstations or multi-user environments may face increased risk if local users can exploit the flaw. The lack of known exploits reduces immediate risk, but the public disclosure increases the likelihood of future exploit development. The vulnerability may also increase the attack surface for insider threats or compromised local accounts.

1. Restrict local access to systems running the Advantech TP-3250 printer driver to trusted personnel only. 2. Monitor and audit local user activities on affected systems to detect suspicious behavior. 3. Implement application whitelisting to prevent unauthorized execution of code in user space. 4. Use endpoint detection and response (EDR) tools to identify anomalous memory corruption or crashes related to the driver. 5. Coordinate with Advantech for timely release and deployment of patches or updated driver versions. 6. If patching is delayed, consider isolating affected devices on segmented networks to limit lateral movement. 7. Educate users about the risks of running untrusted applications locally that might trigger the vulnerability. 8. Regularly review and update printer driver inventories to identify and remediate vulnerable versions.