Security readout for executives and security teams
Plain-English summary
This flaw affects D-Link DIR-850L Rev. A routers on listed firmware and can let an unauthenticated remote attacker change DNS settings by guessing a nonce through repeated requests. A DNS change can redirect users to attacker-controlled services. The source bundle does not show active exploitation or a vendor patch.
Executive priority
Prioritize remediation where these routers protect business users or branch networks. DNS tampering can affect confidentiality and fraud risk, but urgency should be scoped to confirmed affected hardware because the source bundle lacks broad product data and active exploitation evidence.
Technical view
CVE-2017-14423 is in htdocs/parentalcontrols/bind.php on D-Link DIR-850L Rev. A firmware through FW114WWb07_h2ab_beta1. The endpoint fails to prevent unauthenticated nonce-guessing attacks, making unauthorized DNS configuration changes easier. No CVSS, CWE, CPE, or official mitigation is provided in the bundle.
Likely exposure
Exposure is limited by the provided evidence to D-Link DIR-850L Rev. A devices running firmware through FW114WWb07_h2ab_beta1. Risk is higher where router administration or related web endpoints are reachable from untrusted networks.
Exploitation context
The bundle marks KEV as false and provides no cited evidence of active exploitation. The vulnerability is described as remotely reachable and unauthenticated, but the source only says it requires a series of nonce-guessing requests.
Researcher notes
The public CVE data is sparse: no CVSS, CWE, CPE, or patch reference is included. Treat the Pierre Kim advisory and CVE description as the primary evidence, and avoid extending impact to other D-Link models or revisions without separate sourcing.
Mitigation direction
- Identify and retire affected D-Link DIR-850L Rev. A routers where possible.
- Check D-Link guidance for supported firmware or replacement recommendations.
- Disable remote administration from the internet and untrusted networks.
- Restrict router management access to trusted internal admin hosts.
- Monitor DNS settings for unauthorized resolver changes.
Validation and detection
- Inventory routers by model, hardware revision, and firmware version.
- Confirm whether any DIR-850L Rev. A device runs firmware through FW114WWb07_h2ab_beta1.
- Review WAN exposure of router web administration interfaces.
- Check current DNS configuration against approved resolver baselines.
- Search change logs for unexpected parental-control or DNS updates.
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.
CVE-2017-14423 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
- 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://pierrekim.github.io/blog/2017-09-08-dlink-850l-mydlink-cloud-0days-vulnerabilities.htmlCVE 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.