What is the CVSS score of CVE-2026-51633?

CVE-2026-51633 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-2026-51633

EUVD-2026-67891 MEDIUM

Improper Access Control (CWE-284)

2026-08-28 mitre

GHSA-cgmh-jfxg-mwch

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 vector confirmed; no auth required; C:L appropriate as only guest credentials are exposed, not admin or WAN data.

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 getWiFiEasyGuestCfg function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to obtain simplified guest Wi-Fi configuration, including guest credentials, via sending a crafted POST request to /cgi-bin/cstecgi.cgi.

AnalysisAI

Unauthenticated guest Wi-Fi credential exposure in TOTOLINK T6 firmware 4.1.5cu.748_B20211015 allows adjacent-network attackers to retrieve the guest network SSID and password by posting a crafted request to /cgi-bin/cstecgi.cgi targeting the getWiFiEasyGuestCfg handler, which performs no session or authentication validation before returning configuration data. The vulnerability is part of a broader pattern of access-control omissions across this firmware's CGI dispatcher. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access

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Exploit

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Execution

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Vulnerability AssessmentAI

Exploitation	The attacker must have adjacent network access - either within Wi-Fi radio range or already present on the same LAN segment as the router. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment	The CVSS 4.3 score with AV:A is an accurate representation of realistic risk. … 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 a firmware release that enforces authentication on the getWiFiEasyGuestCfg CGI handler. … Detailed patch versions, workarounds, and compensating controls in full report.