Security readout for executives and security teams
Plain-English summary
A network-reachable attacker may change the clock on a TOTOLINK T6 router without authentication. Incorrect time can undermine log accuracy, investigations, and time-dependent operations. The supplied record rates this critical, but it does not document broader compromise or service interruption.
Executive priority
Prioritize immediate identification and isolation of affected, externally reachable routers. Apply vendor guidance when available. Because active exploitation and a specific patched version are not documented, maintain heightened monitoring rather than claiming confirmed compromise.
Technical view
CVE-2026-51725 is a CWE-284 access-control flaw in NTPSyncWithHost on TOTOLINK T6 firmware 4.1.5cu.748_B20211015. An unauthenticated attacker can submit a crafted POST request to /cgi-bin/cstecgi.cgi and alter the device clock. CVSS 3.1 is 9.1, with network access, low complexity, and no user interaction.
Likely exposure
Exposure is most likely where the affected T6 management endpoint is reachable from untrusted networks. The bundle identifies only firmware 4.1.5cu.748_B20211015; applicability to other models or versions is not established.
Exploitation context
The supplied evidence describes an unauthenticated, remotely reachable attack with low complexity. It does not establish active exploitation, and the CVE is not listed as KEV in the bundle. No public exploitation prevalence or confirmed attack campaign is provided.
Researcher notes
The record attributes clock modification to missing access control in NTPSyncWithHost. Its CVSS vector claims high confidentiality and integrity impact, although the supplied description directly demonstrates only clock alteration. No patch version, vendor advisory details, affected-version range, or active exploitation evidence is included, limiting conclusions.
Mitigation direction
- Inventory TOTOLINK T6 devices and identify firmware 4.1.5cu.748_B20211015.
- Restrict management access to trusted administrative networks and users.
- Prevent internet exposure of the router management interface.
- Check TOTOLINK guidance for an updated firmware or vendor-approved mitigation.
- Monitor device clocks and administrative requests for unexplained changes.
Validation and detection
- Confirm each device model and installed firmware through trusted inventory or administration records.
- Verify whether the management interface is reachable from untrusted network segments.
- Review logs for unexpected POST requests to /cgi-bin/cstecgi.cgi.
- Check for unexplained clock, NTP, certificate, or log-timestamp anomalies.
- After remediation, confirm restrictions and firmware state without attempting exploitation.
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-2026-51725 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.