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TOTOLINK T6 CVE-2026-51673

| EUVDEUVD-2026-68536 HIGH
Improper Access Control (CWE-284)
2026-08-31 mitre GHSA-qc8c-mxh4-4jrh
7.5
CVSS 3.1 · Vendor: mitre
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Severity by source

Vendor (mitre) PRIMARY
7.5 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
vuln.today AI
7.5 HIGH

Network-reachable endpoint, no authentication required per description; integrity-only impact as only NTP config is writable, no confidentiality or availability effect.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/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
None
Integrity
High
Availability
None

Lifecycle Timeline

4
Analysis Generated
Sep 01, 2026 - 13:26 vuln.today
CVSS changed
Sep 01, 2026 - 13:22 NVD
7.5 (HIGH)
CVE Published
Aug 31, 2026 - 00:00 cve.org
UNKNOWN (no severity yet)
CVE Published
Aug 31, 2026 - 00:00 cve.org
HIGH 7.5

DescriptionCVE.org

Incorrect access control in the setNtpCfg function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to alter time synchronization settings via sending a crafted POST request to /cgi-bin/cstecgi.cgi.

AnalysisAI

Unauthenticated NTP configuration manipulation in TOTOLINK T6 firmware 4.1.5cu.748_B20211015 allows any network-reachable attacker to overwrite time synchronization settings by sending a crafted POST request directly to /cgi-bin/cstecgi.cgi. The setNtpCfg handler performs no access control check before processing the request, a CWE-284 (Improper Access Control) defect that the CVSS vector confirms is exploitable with no privileges and no user interaction. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
technique details hidden
Delivery
technique details hidden
Exploit
technique details hidden
Execution
technique details hidden
Persist
technique details hidden
Impact
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Vulnerability AssessmentAI

Exploitation The router management web interface must be network-reachable by the attacker - either from the local LAN (default) or from the internet if the remote management feature is enabled. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N) accurately captures the attack surface: network-reachable, zero-click, zero-credential exploitation with a high integrity impact. … 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 patched firmware version has been identified in the available data. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours, identify all TOTOLINK T6 devices running firmware 4.1.5cu.748_B20211015 and restrict network access to the /cgi-bin/cstecgi.cgi endpoint via firewall rules, limiting exposure to trusted administrative networks only. …

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

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CVE-2026-51673 vulnerability details – vuln.today

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