CVE-2025-7460: Buffer Overflow in TOTOLINK T6
A vulnerability has been found in TOTOLINK T6 4.1.5cu.748_B20211015 and classified as critical. Affected by this vulnerability is the function setWiFiAclRules of the file /cgi-bin/cstecgi.cgi of the component HTTP POST Request Handler. The manipulation of the argument mac leads to buffer overflow. The attack can be launched remotely. The exploit has been disclosed to the public and may be used.
AI Analysis
Technical Summary
CVE-2025-7460 is a critical buffer overflow vulnerability identified in the TOTOLINK T6 router, specifically version 4.1.5cu.748_B20211015. The flaw exists in the HTTP POST request handler component, within the setWiFiAclRules function of the /cgi-bin/cstecgi.cgi file. This function processes the 'mac' argument, which is vulnerable to improper input validation leading to a buffer overflow condition. An attacker can exploit this vulnerability remotely without requiring authentication or user interaction, by sending a specially crafted HTTP POST request to the affected endpoint. The buffer overflow can potentially allow an attacker to execute arbitrary code with elevated privileges on the device, compromising its confidentiality, integrity, and availability. The CVSS 4.0 base score is 8.7 (high severity), reflecting the ease of remote exploitation (network vector, low attack complexity, no privileges or user interaction required) and the high impact on confidentiality, integrity, and availability. Although no public exploits are currently observed in the wild, the vulnerability details have been disclosed publicly, increasing the risk of exploitation by threat actors. No official patches or mitigations have been linked yet, which heightens the urgency for affected users to implement protective measures.
Potential Impact
For European organizations, the exploitation of this vulnerability could lead to significant security breaches, especially for enterprises and service providers relying on TOTOLINK T6 routers for network connectivity. Successful exploitation could allow attackers to gain unauthorized control over network infrastructure devices, enabling interception or manipulation of network traffic, disruption of network services, or pivoting to internal systems. This could result in data breaches, operational downtime, and compromise of sensitive information. Given the router’s role in managing WiFi access control lists, attackers might also bypass network access restrictions, further expanding their foothold. The impact is particularly critical for sectors with stringent data protection requirements such as finance, healthcare, and government institutions within Europe. Additionally, the lack of available patches increases the window of exposure, making proactive mitigation essential to prevent potential attacks.
Mitigation Recommendations
Since no official patches are currently available, European organizations should immediately implement network-level protections to mitigate exploitation risks. These include: 1) Restricting access to the router’s management interface by implementing strict firewall rules that limit HTTP POST requests to trusted IP addresses only. 2) Disabling remote management features on TOTOLINK T6 devices if not strictly necessary. 3) Monitoring network traffic for unusual POST requests targeting /cgi-bin/cstecgi.cgi, especially those containing suspicious 'mac' parameters indicative of buffer overflow attempts. 4) Employing intrusion detection/prevention systems (IDS/IPS) with updated signatures to detect exploitation attempts. 5) Planning for rapid firmware updates once vendor patches are released, including testing and deployment procedures. 6) Considering replacement of vulnerable devices with alternative hardware if patching is delayed or unsupported. 7) Conducting regular security audits and vulnerability scans on network devices to identify and remediate similar risks proactively.
Affected Countries
Germany, France, United Kingdom, Italy, Spain, Netherlands, Poland, Belgium
CVE-2025-7460: Buffer Overflow in TOTOLINK T6
Description
A vulnerability has been found in TOTOLINK T6 4.1.5cu.748_B20211015 and classified as critical. Affected by this vulnerability is the function setWiFiAclRules of the file /cgi-bin/cstecgi.cgi of the component HTTP POST Request Handler. The manipulation of the argument mac leads to buffer overflow. The attack can be launched remotely. The exploit has been disclosed to the public and may be used.
AI-Powered Analysis
Technical Analysis
CVE-2025-7460 is a critical buffer overflow vulnerability identified in the TOTOLINK T6 router, specifically version 4.1.5cu.748_B20211015. The flaw exists in the HTTP POST request handler component, within the setWiFiAclRules function of the /cgi-bin/cstecgi.cgi file. This function processes the 'mac' argument, which is vulnerable to improper input validation leading to a buffer overflow condition. An attacker can exploit this vulnerability remotely without requiring authentication or user interaction, by sending a specially crafted HTTP POST request to the affected endpoint. The buffer overflow can potentially allow an attacker to execute arbitrary code with elevated privileges on the device, compromising its confidentiality, integrity, and availability. The CVSS 4.0 base score is 8.7 (high severity), reflecting the ease of remote exploitation (network vector, low attack complexity, no privileges or user interaction required) and the high impact on confidentiality, integrity, and availability. Although no public exploits are currently observed in the wild, the vulnerability details have been disclosed publicly, increasing the risk of exploitation by threat actors. No official patches or mitigations have been linked yet, which heightens the urgency for affected users to implement protective measures.
Potential Impact
For European organizations, the exploitation of this vulnerability could lead to significant security breaches, especially for enterprises and service providers relying on TOTOLINK T6 routers for network connectivity. Successful exploitation could allow attackers to gain unauthorized control over network infrastructure devices, enabling interception or manipulation of network traffic, disruption of network services, or pivoting to internal systems. This could result in data breaches, operational downtime, and compromise of sensitive information. Given the router’s role in managing WiFi access control lists, attackers might also bypass network access restrictions, further expanding their foothold. The impact is particularly critical for sectors with stringent data protection requirements such as finance, healthcare, and government institutions within Europe. Additionally, the lack of available patches increases the window of exposure, making proactive mitigation essential to prevent potential attacks.
Mitigation Recommendations
Since no official patches are currently available, European organizations should immediately implement network-level protections to mitigate exploitation risks. These include: 1) Restricting access to the router’s management interface by implementing strict firewall rules that limit HTTP POST requests to trusted IP addresses only. 2) Disabling remote management features on TOTOLINK T6 devices if not strictly necessary. 3) Monitoring network traffic for unusual POST requests targeting /cgi-bin/cstecgi.cgi, especially those containing suspicious 'mac' parameters indicative of buffer overflow attempts. 4) Employing intrusion detection/prevention systems (IDS/IPS) with updated signatures to detect exploitation attempts. 5) Planning for rapid firmware updates once vendor patches are released, including testing and deployment procedures. 6) Considering replacement of vulnerable devices with alternative hardware if patching is delayed or unsupported. 7) Conducting regular security audits and vulnerability scans on network devices to identify and remediate similar risks proactively.
Affected Countries
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Technical Details
- Data Version
- 5.1
- Assigner Short Name
- VulDB
- Date Reserved
- 2025-07-11T11:14:31.826Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6871861da83201eaacb17733
Added to database: 7/11/2025, 9:46:05 PM
Last enriched: 7/19/2025, 8:58:28 PM
Last updated: 8/22/2025, 5:34:08 PM
Views: 30
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