CVE-2025-58077 is a heap-based buffer overflow vulnerability identified in the TP-Link Archer AX53 v1.0 router, specifically within its tmpserver modules. This vulnerability arises when the device processes network packets containing an excessive number of host entries, leading to improper memory handling on the heap. An attacker with authenticated access on an adjacent network can exploit this flaw by crafting malicious packets that overflow the heap buffer, causing a segmentation fault and potentially enabling arbitrary code execution. The flaw affects firmware versions through 1.3.1 Build 20241120. The vulnerability requires the attacker to have high privileges (authenticated) and be on an adjacent network segment, limiting remote exploitation scope. The CVSS 4.0 vector indicates attack vector as adjacent network (AV:A), high attack complexity (AC:H), no user interaction (UI:N), and high privileges required (PR:H). The impact on confidentiality, integrity, and availability is high, as arbitrary code execution could lead to full device compromise. No public exploits are currently reported, but the vulnerability's nature makes it a significant risk for targeted attacks. The tmpserver module likely handles network management or configuration services, making exploitation impactful for device stability and security.

The vulnerability poses a significant risk to organizations using the TP-Link Archer AX53 v1.0 routers, particularly those with firmware versions up to 1.3.1 Build 20241120. Successful exploitation could lead to arbitrary code execution, allowing attackers to take full control of the device. This can result in network disruption, interception or manipulation of network traffic, and potential pivoting to internal networks. The requirement for authenticated access and adjacency limits the threat to environments where attackers can gain such access, such as compromised internal networks or Wi-Fi networks with weak access controls. However, given the widespread use of TP-Link routers in small to medium enterprises and home environments, the vulnerability could be leveraged in targeted attacks or lateral movement scenarios. The lack of public exploits currently reduces immediate widespread risk but does not eliminate the threat, especially as attackers may develop exploits once the vulnerability is publicly known.

1. Immediately restrict access to the router's management interfaces to trusted and secure networks only, ideally via VLAN segmentation or firewall rules, to prevent unauthorized adjacent network access. 2. Monitor network traffic for unusual or excessive host entry packets targeting the tmpserver module to detect potential exploitation attempts. 3. Implement strong authentication mechanisms and change default credentials to reduce the risk of unauthorized authenticated access. 4. Regularly check for firmware updates from TP-Link and apply patches as soon as they become available to remediate the vulnerability. 5. Consider deploying network intrusion detection/prevention systems (IDS/IPS) capable of identifying anomalous packet patterns related to this vulnerability. 6. For high-security environments, consider replacing affected devices with models that have no known vulnerabilities or have received timely security updates. 7. Conduct internal network segmentation to limit the ability of an attacker to reach the router's management interface from less secure network segments.