Security readout for executives and security teams
Plain-English summary
This flaw affects a specific Belkin N750 router firmware and can let an unauthenticated remote user turn on telnet. Once enabled, telnet reportedly requires no password and provides root access. Business risk is highest where these routers remain deployed, especially if management services are reachable from untrusted networks.
Executive priority
Treat as a targeted legacy-router risk with high impact but uncertain prevalence. Prioritize finding and isolating affected devices before broader remediation planning.
Technical view
CVE-2018-1146 describes unauthenticated remote activation of telnet on Belkin N750 DB F9K1103 firmware 1.10.22 through the router web interface. The enabled telnet service reportedly has passwordless root access. The sources do not provide CVSS, confirmed exploitation, or a vendor patch statement.
Likely exposure
Exposure appears limited to Belkin N750 DB Wi-Fi Dual-Band N+ Gigabit Router F9K1103 running firmware 1.10.22. Risk depends on whether the router management interface is reachable by attackers and whether the device is still in service.
Exploitation context
The CVE and Tenable advisory describe remote unauthenticated access leading to passwordless root telnet. The provided bundle does not indicate CISA KEV listing, active exploitation, public exploit use, or exploitation telemetry.
Researcher notes
Key unknowns are patch availability, exact affected-version range, and real-world exposure. Avoid assuming impact beyond the named Belkin F9K1103 firmware without additional vendor or testing evidence.
Mitigation direction
- Inventory Belkin N750 F9K1103 routers and confirm firmware versions.
- Check Belkin or trusted advisory guidance for firmware updates or retirement advice.
- Remove affected routers from internet-facing or untrusted management exposure.
- Disable telnet where administratively possible and restrict management access to trusted networks.
- Replace unsupported affected devices if no vendor-supported fix is available.
Validation and detection
- Verify whether any Belkin N750 F9K1103 devices remain deployed.
- Confirm firmware version through approved asset records or device administration.
- Review external attack surface records for exposed router management interfaces.
- Confirm telnet is disabled or blocked from untrusted networks.
- Review logs or network telemetry for unexpected telnet service activity.
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
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Credential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2018-1146 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://www.tenable.com/security/research/tra-2018-08CVE reference · x_refsource_MISC
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.