Security readout for executives and security teams
Plain-English summary
A flaw in TOTOLINK T6 firmware can expose the router’s current WPS PIN to an unauthenticated network attacker. Disclosure of this credential could help an attacker gain unauthorized wireless access. The supplied record does not identify other affected models or firmware versions.
Executive priority
Treat confirmed affected, reachable devices as an urgent remediation item. Prioritize internet-facing or broadly accessible management interfaces first. Because no fixed release is identified here, require owners to obtain vendor guidance quickly and isolate or replace devices when supported remediation is unavailable.
Technical view
CVE-2026-51626 is an access-control failure in getWiFiWpsCfg on TOTOLINK T6 firmware 4.1.5cu.748_B20211015. An unauthenticated POST request to /cgi-bin/cstecgi.cgi can return WPS configuration, including the current PIN. CVSS 3.1 rates it 9.1: network-accessible, low complexity, no privileges or interaction, with high confidentiality and integrity impact.
Likely exposure
Confirmed scope is TOTOLINK T6 running 4.1.5cu.748_B20211015. Risk is greatest where the affected CGI interface is reachable from untrusted networks. The supplied structured affected-product fields are incomplete, so broader version or model exposure cannot be established.
Exploitation context
The supplied record does not establish active exploitation, and the CVE is not identified as being in KEV. Public vendor-coordination references exist, but this bundle provides no evidence of exploitation in the wild. Network reachability and lack of authentication make attempted exploitation plausible.
Researcher notes
The weakness maps to CWE-284. The disclosure mechanism and exact affected firmware are stated, but the supplied affected-product metadata is listed as n/a. No patch, fixed version, observed exploitation, or complete product range is established. CVSS indicates high confidentiality and integrity impact without availability impact.
Mitigation direction
- Identify TOTOLINK T6 devices and confirm their installed firmware versions.
- Check TOTOLINK guidance for patched firmware; no fixed version is named in the supplied sources.
- Restrict the router management interface to trusted networks and administrators.
- Disable WPS if supported and operationally acceptable, pending authoritative vendor remediation.
- Isolate or replace affected devices if no supported remediation is available.
Validation and detection
- Confirm the device model and firmware through its trusted administrative interface or asset records.
- Determine whether /cgi-bin/cstecgi.cgi is reachable from untrusted network segments.
- Review available access logs for unexpected requests to the affected CGI endpoint.
- After remediation, verify WPS configuration cannot be retrieved without authentication.
- Confirm management access remains restricted after configuration or firmware changes.
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-2026-51626 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.
CWE mapping pending import
This CVE carries a CWE mapping that will resolve to a full Glexia CWE intelligence page after the official CWE import is complete.