CVE-2025-7532 is a critical stack-based buffer overflow vulnerability identified in the Tenda FH1202 router, specifically affecting firmware version 1.2.0.14(408). The flaw resides in the function fromwebExcptypemanFilter within the /goform/webExcptypemanFilter endpoint. The vulnerability is triggered by manipulating the 'page' argument, which leads to a stack-based buffer overflow condition. This type of vulnerability occurs when data exceeding the buffer's capacity is written to the stack, potentially overwriting adjacent memory and allowing an attacker to execute arbitrary code or cause a denial of service. The vulnerability is remotely exploitable without requiring user interaction or prior authentication, as indicated by the CVSS vector (AV:N/AC:L/AT:N/UI:N/PR:L). The CVSS 4.0 base score is 8.7, categorizing it as high severity. The exploit has been publicly disclosed, increasing the risk of exploitation, although no known active exploitation in the wild has been reported yet. The vulnerability impacts the confidentiality, integrity, and availability of the affected device, as successful exploitation could allow remote code execution, leading to full compromise of the router. Given the critical role of routers in network infrastructure, this vulnerability poses a significant threat to network security and stability for users of the Tenda FH1202 device running the vulnerable firmware version.

For European organizations, the exploitation of CVE-2025-7532 could have severe consequences. Routers like the Tenda FH1202 are often deployed in small to medium-sized business environments and home offices, serving as gateways to corporate networks. A successful attack could allow adversaries to gain unauthorized access to internal networks, intercept or manipulate sensitive communications, and disrupt network availability. This could lead to data breaches, espionage, or operational downtime. The compromise of network infrastructure devices also undermines trust in the organization's security posture and could result in regulatory non-compliance, especially under GDPR requirements for protecting personal data. Additionally, the public disclosure of the exploit increases the likelihood of automated attacks targeting vulnerable devices across Europe, amplifying the risk of widespread impact.

To mitigate this vulnerability, European organizations using Tenda FH1202 routers should immediately verify the firmware version in use and upgrade to a patched version once available from the vendor. In the absence of an official patch, organizations should consider the following measures: restrict remote management access to trusted IP addresses or disable remote management entirely; implement network segmentation to isolate vulnerable devices from critical assets; deploy intrusion detection/prevention systems (IDS/IPS) to monitor and block suspicious traffic targeting the /goform/webExcptypemanFilter endpoint; enforce strict firewall rules to limit inbound traffic to the router's management interfaces; and conduct regular security audits to identify and remediate vulnerable devices. Additionally, organizations should monitor threat intelligence feeds for any emerging exploit activity related to this CVE and prepare incident response plans accordingly.