What is the CVSS score of CVE-2026-51637?

CVE-2026-51637 has a CVSS 3.1 base score of 4.3 (Medium). CVSS vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N. EPSS exploitation probability: 0.2%.

TOTOLINK T6 CVE-2026-51637

EUVD-2026-67887 MEDIUM

Improper Access Control (CWE-284)

2026-08-28 mitre

GHSA-3qjc-xccj-8hhf

Authentication Bypass

4.3

CVSS 3.1 · Vendor: mitre

Severity by source

Vendor (mitre) PRIMARY

4.3 MEDIUM

AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

vuln.today AI

4.3 MEDIUM

Adjacent-only access, no auth required, read-only disclosure of mesh topology data - no integrity or availability impact.

3.1 AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

4.0 AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (mitre).

CVSS VectorVendor: mitre

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Lifecycle Timeline

Metadata Corrected

Sep 01, 2026 - 20:40 vuln.today

tag: N A removed

Analysis Generated

Sep 01, 2026 - 19:40 vuln.today

CVSS changed

Sep 01, 2026 - 19:22 NVD

4.3 (MEDIUM)

CVE Published

Aug 28, 2026 - 00:00 cve.org

UNKNOWN (no severity yet)

DescriptionCVE.org

Incorrect access control in the getMeshPortalTable function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to obtain mesh portal table information via sending a crafted POST request to /cgi-bin/cstecgi.cgi.

AnalysisAI

Unauthenticated information disclosure in TOTOLINK T6 firmware 4.1.5cu.748_B20211015 exposes mesh portal table data to any adjacent network attacker. The getMeshPortalTable function in /cgi-bin/cstecgi.cgi performs no authentication check, allowing a crafted POST request to retrieve mesh network topology details without credentials. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Execution

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Vulnerability AssessmentAI

Exploitation	Attacker must be on the same adjacent network as the TOTOLINK T6 router (LAN or Wi-Fi segment) - remote internet-based exploitation is not possible per CVSS AV:A. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment	Real-world risk is low-to-moderate and aligned with the CVSS 4.3 base score. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation	Check the TOTOLINK firmware download page (https://www.totolink.net/home/menu/detail/menu_listtpl/download/id/190/ids/36.html) for an updated firmware release that addresses the missing authentication on getMeshPortalTable. … Detailed patch versions, workarounds, and compensating controls in full report.