Security readout for executives and security teams
Plain-English summary
A TOTOLINK T6 router running firmware 4.1.5cu.748_B20211015 may disclose parental-control rules to an unauthenticated network attacker. The weakness could expose household or organizational policy information without requiring credentials. The supplied record rates it critical, but publicly provided evidence does not identify a confirmed patch or exploitation in the wild.
Executive priority
Prioritize immediate inventory and exposure reduction for affected routers, especially internet-accessible devices. Because no confirmed patch is identified in the supplied evidence, assign ownership to verify current vendor guidance and replace devices if supported remediation is unavailable. Avoid claiming compromise solely from product presence.
Technical view
CVE-2026-51646 is an incorrect access-control flaw, classified as CWE-284, in the getParentalRules function. A crafted POST request to /cgi-bin/cstecgi.cgi can reportedly retrieve parental-control rules without authentication. CVSS 3.1 is 9.1 with network access, low complexity, no privileges, and no user interaction.
Likely exposure
Exposure is most likely where a TOTOLINK T6 running the named firmware permits attacker access to its web management interface. Internet-facing administration presents the clearest risk, but attackers already present on an accessible local or management network may also reach the vulnerable CGI endpoint. Other products or firmware versions are not established by the supplied sources.
Exploitation context
The supplied record is not in KEV, and the source bundle provides no evidence of active exploitation. Public coordination references indicate vulnerability disclosure activity, not confirmed attacks. Treat exploit prevalence as unknown.
Researcher notes
The description supports unauthorized disclosure of parental-control rules. Although the CVSS vector claims high confidentiality and integrity impact, the supplied narrative does not explain an integrity-changing outcome. Structured affected-product fields are listed as unavailable, while the title and description specifically name TOTOLINK T6 firmware 4.1.5cu.748_B20211015.
Mitigation direction
- Identify TOTOLINK T6 devices running firmware 4.1.5cu.748_B20211015.
- Check TOTOLINK guidance for a fixed firmware or vendor-approved mitigation.
- Block internet access to router management interfaces.
- Restrict management access to trusted administrative networks and users.
- Monitor management-interface requests for unexpected access to the affected CGI endpoint.
Validation and detection
- Verify each device model and installed firmware through trusted inventory or administration records.
- Confirm whether management interfaces are reachable from the internet or untrusted networks.
- Review access controls protecting the web management interface.
- Check TOTOLINK's download page for firmware newer than the named affected build.
- Review logs for unexpected unauthenticated requests involving the affected CGI endpoint.
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-2026-51646 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.