CVE-2025-62673 is a heap-based buffer overflow vulnerability identified in the TP-Link Archer AX53 v1.0 router, affecting firmware versions through 1.3.1 Build 20241120. The vulnerability resides in the tdpserver modules, which handle network packets. An adjacent attacker—meaning one with access to the same local network segment—can send a specially crafted network packet containing a malformed field that triggers a heap overflow. This overflow can cause a segmentation fault, leading to denial of service, or potentially allow the attacker to execute arbitrary code with the privileges of the affected process. The vulnerability is classified under CWE-122, indicating improper memory handling on the heap. The CVSS 4.0 vector (AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N) shows that the attack requires adjacent network access and low complexity, with no user interaction or authentication needed, but low privileges are required. The impact on confidentiality, integrity, and availability is high, as arbitrary code execution could lead to full device compromise, data interception, or network pivoting. No known exploits are currently in the wild, and no official patches have been published yet. This vulnerability poses a significant risk to environments using the Archer AX53 router, especially in enterprise or sensitive home networks where device compromise could lead to broader network infiltration.

The potential impact of CVE-2025-62673 is substantial. Successful exploitation could allow attackers to execute arbitrary code on the router, leading to full compromise of the device. This could result in interception or manipulation of network traffic, disruption of network availability, and use of the compromised router as a foothold for lateral movement within an organization’s network. Given the router’s role as a network gateway, attackers could bypass perimeter defenses, exfiltrate sensitive data, or launch further attacks against internal systems. The requirement for adjacent network access limits remote exploitation but does not eliminate risk, especially in environments with untrusted or guest networks, or where attackers have gained partial network access. The lack of authentication and user interaction requirements increases the ease of exploitation once network access is obtained. Organizations relying on this router model, particularly in small to medium business or home office environments, face elevated risk until a patch is released.

To mitigate this vulnerability, organizations should immediately implement network segmentation to restrict access to the router’s management and service interfaces, limiting exposure to trusted devices only. Disable or restrict access to the tdpserver modules if possible, or apply firewall rules to block suspicious or malformed packets targeting these services. Monitor network traffic for anomalous packets that could indicate exploitation attempts. Employ network intrusion detection systems (NIDS) with updated signatures to detect potential buffer overflow attempts. Until an official patch or firmware update is released by TP-Link, consider replacing vulnerable devices with models not affected by this issue in high-risk environments. Regularly check TP-Link’s official channels for firmware updates addressing this vulnerability and apply them promptly. Educate network users about the risks of connecting unknown devices to the local network to reduce the chance of an attacker gaining adjacent access.