CVE-2026-51728: n/a
Description
Incorrect access control in the UploadFirmwareFile function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to upload a crafted firmware image via sending a crafted POST request to /cgi-bin/cstecgi.cgi.
CVSS v3.1
Score 9.8critical
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability CVE-2026-51728 affects TOTOLINK T6 firmware 4.1.5cu.748_B20211015. Due to improper access control in the UploadFirmwareFile function, an unauthenticated attacker can send a crafted POST request to the /cgi-bin/cstecgi.cgi endpoint to upload a malicious firmware image. This flaw allows attackers to potentially execute arbitrary code, disrupt device availability, and gain full control over the affected device. The CVSS v3.1 base score is 9.8, indicating critical severity with network attack vector, no privileges required, no user interaction, and high impact on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation allows unauthenticated attackers to upload arbitrary firmware images, leading to complete compromise of the device, including execution of arbitrary code, data confidentiality breach, and denial of service.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a patch or official fix is available, restrict network access to the device's management interface and monitor for suspicious POST requests to /cgi-bin/cstecgi.cgi. Avoid exposing the device management interface to untrusted networks.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-06-08T00:00:00.000Z
- State
- PUBLISHED
Threat ID: 6a95bbe5acd9273b496368d1
Added to database: 08/31/2026, 17:37:41 UTC
Last enriched: 09/07/2026, 13:42:42 UTC
Last updated: 10/13/2026, 18:48:21 UTC
Views: 49
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