Security readout for executives and security teams
Plain-English summary
A flaw in the TOTOLINK T6 router firmware can let an unauthenticated network attacker create and obtain a new WPS PIN. That could undermine wireless access controls and expose connected systems or traffic. The reported issue affects firmware 4.1.5cu.748_B20211015; the supplied sources do not establish whether other versions are affected.
Executive priority
Treat confirmed devices as an urgent remediation priority, especially in offices, branches, or homes protecting sensitive access. Immediately reduce management-interface exposure and disable WPS where feasible. Obtain vendor guidance promptly; the supplied sources do not identify a confirmed patch or document active exploitation.
Technical view
CVE-2026-51628 is an incorrect-access-control vulnerability in getGenerateWiFiWpsPin. The affected CGI interface accepts an unauthenticated request that generates and returns a WPS PIN. It is rated CVSS 9.1 because exploitation is network-accessible, low-complexity, requires no privileges or user interaction, and can significantly affect confidentiality and integrity.
Likely exposure
Confirmed scope is TOTOLINK T6 firmware 4.1.5cu.748_B20211015. Risk is greatest where the router management CGI interface is reachable from untrusted networks and WPS is enabled. The source bundle provides no CPE data, deployment prevalence, or evidence that additional firmware releases are vulnerable.
Exploitation context
The vulnerability is remotely reachable without authentication according to the CVE description. However, it is not listed as CISA KEV in the supplied data, and the cited sources provide no evidence of active exploitation, public weaponization, or observed attacks.
Researcher notes
The record identifies CWE-284 and a specific function, endpoint, model, and firmware build. It does not provide affected-version ranges, CPEs, patch status, discovery telemetry, or exploitation evidence. Validation should remain non-invasive and authorized; avoid generating a new WPS PIN on production equipment because that may alter security state.
Mitigation direction
- Inventory TOTOLINK T6 devices and identify those running firmware 4.1.5cu.748_B20211015.
- Check TOTOLINK guidance for a corrected firmware release or vendor-approved mitigation.
- Restrict router administration interfaces to trusted management networks and prevent internet exposure.
- Disable WPS where operationally acceptable until vendor guidance or corrected firmware is available.
- Replace affected devices if no supported remediation becomes available and exposure cannot be adequately restricted.
Validation and detection
- Confirm each TOTOLINK T6 firmware version through an authenticated administrative or asset-management interface.
- Verify the management CGI interface is inaccessible from internet and other untrusted network segments.
- Confirm WPS is disabled on affected devices where the temporary mitigation was selected.
- Review router and perimeter logs for unexpected access to the identified CGI endpoint.
- After remediation, verify the installed firmware version against current TOTOLINK release information.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-284: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-51628 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N3.95.2CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
9.1CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://www.totolink.net/home/menu/detail/menu_listtpl/download/id/190/ids/36.htmlCVE reference, mitre
- https://www.totolink.net/CVE reference, mitre
- https://github.com/DarkBoulder/CVE-Vendor-Coordination/blob/main/TOTOLINK/README.mdCVE reference, mitre
- https://github.com/ShengWu00/CVE-Vendor-Coordination/blob/main/TOTOLINK/README.mdCVE reference, mitre
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Access Control
Improper Access Control represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.