Description
Incorrect access control in the getDeviceInfo function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to obtain device identification details via sending a crafted POST request to /cgi-bin/cstecgi.cgi.
Published: 2026-08-28
Score: 4.3 Medium
EPSS: < 1% Very Low
KEV: No
Impact: Information Disclosure
Action: Patch Firmware
AI Analysis

Impact

The getDeviceInfo function of TOTOLINK T6 firmware 4.1.5cu.748_B20211015 contains an improper access‑control bug (CWE‑284). An unauthenticated attacker can send a specially crafted POST request to /cgi-bin/cstecgi.cgi and receive device identification data such as the serial number, firmware version, or network identifiers. This grants an attacker the ability to learn the router's internal details without authenticating, which constitutes information disclosure.

Affected Systems

Only the TOTOLINK T6 router running the firmware version 4.1.5cu.748_B20211015 is affected. Earlier firmware releases that have not applied a subsequent patch may also be vulnerable, but the issue is documented only for this specific build. No other vendors or products are listed as affected in the CNA data.

Risk and Exploitability

The vulnerability has a CVSS score of 4.3, indicating a low to moderate severity in the CVSS v3 scale. An EPSS score of less than 1% suggests a very low probability of exploitation at present. The flaw is remotely exploitable over the local network by any host that can reach the router's HTTP interface, and it is not listed in the CISA KEV catalog, so it is not a known, actively exploited vulnerability.

Generated by OpenCVE AI on September 2, 2026 at 06:39 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Flash the router with the latest firmware release that contains the getDeviceInfo access‑control fix.
  • Configure the router's firewall or access‑control settings to block unauthenticated POST traffic to /cgi-bin/cstecgi.cgi or restrict it to trusted management subnets.
  • Monitor router logs or use network intrusion detection to identify and alert on unexpected POST requests to /cgi-bin/cstecgi.cgi.

Generated by OpenCVE AI on September 2, 2026 at 06:39 UTC.

Tracking

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Advisories

No advisories yet.

History

Wed, 02 Sep 2026 08:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Wed, 02 Sep 2026 07:00:00 +0000

Type Values Removed Values Added
Title Unauthenticated Access To Device Information via POST Request on TOTOLINK T6

Tue, 01 Sep 2026 22:00:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'}

Fri, 28 Aug 2026 21:00:00 +0000

Type Values Removed Values Added
Title Unauthenticated Access To Device Information via POST Request on TOTOLINK T6
Weaknesses CWE-284

Fri, 28 Aug 2026 20:45:00 +0000

Type Values Removed Values Added
First Time appeared Totolink
Totolink t6
Vendors & Products Totolink
Totolink t6

Fri, 28 Aug 2026 19:45:00 +0000

Type Values Removed Values Added
Description Incorrect access control in the getDeviceInfo function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to obtain device identification details via sending a crafted POST request to /cgi-bin/cstecgi.cgi.
References

Subscriptions

Totolink T6
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-09-01T19:04:25.099Z

Reserved: 2026-06-08T00:00:00.000Z

Link: CVE-2026-51613

cve-icon Vulnrichment

Updated: 2026-09-01T19:04:20.320Z

cve-icon NVD

Status : Deferred

Published: 2026-08-28T20:18:04.430

Modified: 2026-09-01T19:17:21.553

Link: CVE-2026-51613

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-02T06:45:05Z

Weaknesses