CVE-2026-51681: n/a
Description
CVE-2026-51681 is a critical vulnerability in TOTOLINK T6 firmware version 4.1.5cu.748_B20211015. It involves incorrect access control in the setRemoteCfg function, allowing unauthenticated attackers to expose WAN-side administration by sending a crafted POST request to /cgi-bin/cstecgi.cgi. This can lead to full confidentiality and integrity compromise without requiring user interaction.
CVSS v3.1
Score 9.1critical
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability arises from improper access control in the setRemoteCfg function of TOTOLINK T6 4.1.5cu.748_B20211015. An attacker can send a specially crafted POST request to the /cgi-bin/cstecgi.cgi endpoint to expose WAN-side administrative interfaces without authentication. The CVSS 3.1 score is 9.1, indicating critical severity with network attack vector, no privileges or user interaction required, and high impact on confidentiality and integrity. No patch or remediation information is currently available, and no known exploits are reported in the wild.
Potential Impact
Successful exploitation allows unauthenticated attackers to expose and potentially access WAN-side administration interfaces, leading to a complete compromise of confidentiality and integrity of the device's administrative functions. This could enable attackers to control or manipulate device settings remotely.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict WAN-side access to the device administration interface and monitor network traffic for suspicious POST requests to /cgi-bin/cstecgi.cgi.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-06-08T00:00:00.000Z
- State
- PUBLISHED
Threat ID: 6a958ab8acd9273b492f0882
Added to database: 08/31/2026, 14:07:52 UTC
Last enriched: 09/07/2026, 15:20:26 UTC
Last updated: 10/16/2026, 18:48:21 UTC
Views: 59
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.