EUVD-2025-17589CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
4DescriptionNVD
A vulnerability was found in TOTOLINK T10 4.1.8cu.5207 and classified as critical. This issue affects the function setUpgradeFW of the file /cgi-bin/cstecgi.cgi of the component POST Request Handler. The manipulation of the argument slaveIpList leads to buffer overflow. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used.
AnalysisAI
Critical remote buffer overflow vulnerability in TOTOLINK T10 firmware version 4.1.8cu.5207 affecting the setUpgradeFW function in the POST request handler. An authenticated remote attacker can exploit improper input validation on the slaveIpList parameter to achieve complete system compromise with high confidentiality, integrity, and availability impact. The vulnerability has public exploit code available and represents an actively exploitable threat.
Technical ContextAI
The vulnerability exists in the POST request handler component (/cgi-bin/cstecgi.cgi) of TOTOLINK T10 network equipment firmware. The root cause is classified as CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer), which encompasses classic buffer overflow conditions. The setUpgradeFW function fails to properly validate or sanitize the length of the 'slaveIpList' argument before copying it into a fixed-size buffer, allowing an attacker to write beyond buffer boundaries. This is a stack or heap-based buffer overflow that can corrupt adjacent memory structures, potentially enabling arbitrary code execution. The vulnerability is triggered through HTTP POST requests to the CGI handler, a common attack surface in embedded network devices.
RemediationAI
Immediate actions: (1) Apply firmware patches from TOTOLINK if available—check TOTOLINK security advisories and product support pages for T10 firmware updates newer than 4.1.8cu.5207; (2) If patches are unavailable, isolate affected T10 devices to trusted networks and restrict administrative access via firewall rules; (3) Implement network segmentation to prevent lateral movement if compromise occurs; (4) Disable unnecessary services and the upgrade function if operationally feasible; (5) Monitor device logs for POST requests to /cgi-bin/cstecgi.cgi with suspicious slaveIpList parameters; (6) Enforce strong authentication credentials on the device if it remains in use; (7) Consider replacing the device with patched alternatives from TOTOLINK or competitive vendors if firmware updates are not available within 30 days. Long-term: Track TOTOLINK security advisories and establish firmware update processes for all network equipment.
More from same product – last 7 days
An authentication logic vulnerability in multiple TP-Link range extenders allows an unauthenticated attacker on an adjac
Cleartext Bluetooth transmission in TP-Link Tapo L535E, P300, and D100C devices allows adjacent attackers to intercept a
Share
External POC / Exploit Code
Leaving vuln.today