CVE-2026-51638

Incorrect access control in the getWiFiGuestCfg function of TOTOLINK T6 4.1.5cu.748_B20211015...

4.3 Medium

Incorrect access control in the getWiFiGuestCfg function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to obtain guest Wi-Fi configuration information via sending a crafted POST request to /cgi-bin/cstecgi.cgi.

Attack profile

How easy it is to exploit

Attack vector: Adjacent network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: Low
Integrity: None
Availability: None

Exploit likelihood

0.29%Up 0.1 points since Aug 29, 2026

What each source reports

CVE List Score used 4.3

Record: CVE-2026-51638
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness: CWE-284
Updated: 2026-11-02

EUVDEUVD-2026-67886 4.3

Record: EUVD-2026-67886
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Updated: 2026-11-02

GitHub AdvisoriesGHSA-6jxw-8xf7-29wq 4.3

Incorrect access control in the getWiFiGuestCfg function of TOTOLINK T6 4.1.5cu.748_B20211015...

Record: GHSA-6jxw-8xf7-29wq
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness: CWE-284
Updated: 2026-11-02

NVD 4.3

Record: CVE-2026-51638
CVSS 3.1: 4.3 MediumCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness: CWE-284
Updated: 2026-11-02

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-51638 is a medium vulnerability (CVSS 4.3), published August 28, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.29%, the 21st percentile. No source names a fixed version.