What is the CVSS score of EUVD-2026-67919?

EUVD-2026-67919 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N. EPSS exploitation probability: 0.2%.

Which versions of TOTOLINK T6 are affected by EUVD-2026-67919?

TOTOLINK T6 routers expose cloud remote-control configuration to any network-adjacent attacker without authentication, revealing whether remote management is active and its target URL.

How to fix or mitigate EUVD-2026-67919?

Within 24 hours, inventory TOTOLINK T6 devices on your network and identify which run firmware 4.1.5cu.748_B20211015 or earlier; disable cloud remote-control (CRPC) for each device where not operationally required and verify disablement via the getCrpcCfg endpoint. Within 7 days, deploy firewall rules or VPN-based access controls restricting unauthenticated requests to the /cgi-bin/cstecgi.cgi endpoint; segregate router management interfaces from untrusted network segments using VLAN isolation where feasible. Within 30 days, establish a monitoring plan for TOTOLINK security advisories to track patched firmware releases and schedule upgrades of all affected T6 units; if CRPC is mission-critical, evaluate alternative secure management channels (e.g., VPN-gated admin access) as interim replacements pending vendor patch availability.

TOTOLINK T6 EUVD-2026-67919

| CVE-2026-51647 HIGH

Improper Access Control (CWE-284)

2026-08-28 mitre

GHSA-79gx-m5qg-8x23

Authentication Bypass TOTOLINK

7.5

CVSS 3.1 · Vendor: mitre

Severity by source

Vendor (mitre) PRIMARY

7.5 HIGH

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

vuln.today AI

5.3 MEDIUM

Disclosed data is limited to CRPC status and cloud URL - not credentials or full config - so C:H overstates impact; C:L is appropriate.

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

4.0 AV:N/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

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Lifecycle Timeline

Metadata Corrected

Sep 01, 2026 - 17:40 vuln.today

tag: N A replaced by TOTOLINK

Analysis Generated

Sep 01, 2026 - 17:30 vuln.today

CVSS changed

Sep 01, 2026 - 17:22 NVD

7.5 (HIGH)

CVE Published

Aug 28, 2026 - 00:00 cve.org

UNKNOWN (no severity yet)

CVE Published

Aug 28, 2026 - 00:00 cve.org

HIGH 7.5

DescriptionCVE.org

Incorrect access control in the getCrpcCfg function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to obtain cloud remote-control status and URL 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 cloud remote-control (CRPC) status and management URL through the getCrpcCfg function. The /cgi-bin/cstecgi.cgi endpoint processes POST requests without enforcing access control, allowing any network-adjacent attacker to enumerate whether cloud remote management is active and retrieve its target URL. …

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Attack ChainAIDerived

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Vulnerability AssessmentAI

Exploitation	No authentication is required to trigger this vulnerability - the CVSS vector PR:N confirms unauthenticated access. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment	The CVSS 3.1 vector AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N rates this 7.5, but C:H overstates the sensitivity of the disclosed data - the leak is limited to cloud remote-control enablement status and a management URL, not credentials, session tokens, or full configuration. … 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	No vendor-released patch with a confirmed fix version has been identified at time of analysis. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours, inventory TOTOLINK T6 devices on your network and identify which run firmware 4.1.5cu.748_B20211015 or earlier; disable cloud remote-control (CRPC) for each device where not operationally required and verify disablement via the getCrpcCfg endpoint. …

Threat intelligence, references, and detailed analysis are available after sign-in.