CVE-2026-51652: n/a
Description
Incorrect access control in the getUPnPCfg function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to obtain UPnP enablement and parsed port-mapping information via sending a crafted POST request to /cgi-bin/cstecgi.cgi.
CVSS v3.1
Score 4.3medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability exists due to incorrect access control in the getUPnPCfg function of TOTOLINK T6 firmware 4.1.5cu.748_B20211015. An unauthenticated attacker can exploit this flaw by sending a crafted POST request to the /cgi-bin/cstecgi.cgi CGI endpoint, which allows them to obtain information about whether UPnP is enabled and details about port mappings configured on the device. This information disclosure does not impact integrity or availability and requires adjacent network access.
Potential Impact
An attacker can obtain sensitive configuration information related to UPnP enablement and port mappings without authentication. This could aid in further reconnaissance or targeted attacks but does not directly allow modification or disruption of the device.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or workaround is currently documented. Until a patch is available, restricting network access to the device's management interface and monitoring for suspicious POST requests to /cgi-bin/cstecgi.cgi may reduce exposure.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-06-08T00:00:00.000Z
- State
- PUBLISHED
Threat ID: 6a91e409acd9273b4942e7b3
Added to database: 08/28/2026, 19:39:53 UTC
Last enriched: 09/07/2026, 14:30:28 UTC
Last updated: 10/11/2026, 06:48:17 UTC
Views: 29
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