CVE-2026-51739: n/a
Description
Incorrect access control in the CloudSrvVersionCheck function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to trigger cloud update checks via sending a crafted POST request to /cgi-bin/cstecgi.cgi.
CVSS v3.1
Score 5.9medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves improper access control in the CloudSrvVersionCheck function of TOTOLINK T6 firmware 4.1.5cu.748_B20211015. An unauthenticated attacker can exploit this by sending a specially crafted POST request to the /cgi-bin/cstecgi.cgi endpoint, triggering cloud update checks without authorization. The CVSS vector indicates the attack requires network access with high attack complexity and no privileges or user interaction, impacting confidentiality but not integrity or availability.
Potential Impact
The vulnerability allows unauthenticated attackers to trigger cloud update checks, which could potentially expose sensitive information related to update processes or system state. However, it does not allow modification or disruption of the system (no integrity or availability impact). The confidentiality impact is rated high per the CVSS vector, but the overall severity is medium.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or mitigation instructions are currently available. Until a patch is released, limit exposure of the affected endpoint if possible and monitor for suspicious POST requests targeting /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: 6a95df10acd9273b49881165
Added to database: 08/31/2026, 20:07:44 UTC
Last enriched: 09/07/2026, 14:24:47 UTC
Last updated: 10/14/2026, 06:48:18 UTC
Views: 57
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.