Security readout for executives and security teams
Plain-English summary
This issue affects specific D-Link DIR-850L router revisions where the password file is writable by all users. If an attacker already gains access to the device or abuses another flaw, they may be able to alter account data and maintain control. The provided sources do not show active exploitation.
Executive priority
Treat this as a legacy network-device hygiene issue with meaningful control-plane risk. Prioritize discovery and replacement or isolation of affected routers, especially in business networks, branch offices, or environments where the router protects sensitive systems.
Technical view
CVE-2017-14424 describes insecure 0666 permissions on /var/passwd in D-Link DIR-850L Rev. A firmware through FW114WWb07_h2ab_beta1 and Rev. B through FW208WWb02. The source bundle does not provide CVSS, CWE, patch details, or evidence of KEV-listed exploitation.
Likely exposure
Exposure is limited to organizations still using D-Link DIR-850L Rev. A or Rev. B devices at or below the listed firmware versions. Risk is higher where router administration, local services, or other vulnerabilities could give an attacker write access on the device.
Exploitation context
The sources support an insecure file-permission condition, not a confirmed standalone remote exploit path. This weakness is most concerning when chained with another vulnerability, weak device access control, exposed management services, or attacker foothold on the router.
Researcher notes
The public CVE record is sparse. The strongest cited detail is the 0666 permission on /var/passwd and the affected firmware bounds. Avoid assuming remote exploitability, active exploitation, or a specific vendor fix unless confirmed by additional vendor documentation.
Mitigation direction
- Inventory D-Link DIR-850L Rev. A and Rev. B devices.
- Check D-Link guidance for fixed firmware or end-of-support status.
- Upgrade firmware only where vendor guidance confirms remediation.
- Replace unsupported affected routers with supported hardware.
- Restrict router management access to trusted administrative networks.
- Remove affected devices from internet-facing or high-trust roles.
Validation and detection
- Identify device revision and exact firmware version.
- Confirm whether /var/passwd is world-writable on test hardware.
- Review router management exposure and remote access settings.
- Check logs and configuration for unexpected account changes.
- Document compensating controls for devices awaiting replacement.
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-2017-14424 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.