SEPTEMBER 15, 2026
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Case File

CVE-2026-51691

CRITICAL · CVSS 9.8 EPSS 0.44% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-08-31 · Last synced 2026-09-15

CyberRota Analysis

AI-Generated

TOTOLINK T6 firmware version 4.1.5cu.748_B20211015 has an incorrect access control vulnerability in the setUploadSetting function, allowing unauthenticated attackers to manipulate the upload or flash workflow by sending a specially crafted POST request to the /cgi-bin/cstecgi.cgi endpoint. This could lead to unauthorized modifications of the device's firmware, potentially compromising its integrity and functionality. Organizations using this firmware should prioritize patching or mitigating this vulnerability to prevent exploitation.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links
github.com ↗ github.com ↗

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-51691
Severity
CRITICAL
CVSS
9.8
EPSS
0.44%

Original NVD Description

Incorrect access control in the setUploadSetting function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to manipulate the upload or flash workflow via sending a crafted POST request to /cgi-bin/cstecgi.cgi.