Security readout for executives and security teams
Plain-English summary
Certain D-Link DIR-850L Rev. A and Rev. B routers can be forced to run attacker-controlled commands as root through the DHCP client. This is critical because compromise of a router can expose traffic, change network settings, and provide a foothold. The provided sources do not name a confirmed vendor patch or active exploitation.
Executive priority
Prioritize replacement or vendor-confirmed remediation for affected routers in business networks. Root-level router compromise can undermine network trust, traffic confidentiality, and availability. If these devices support critical connectivity, treat this as an urgent infrastructure risk rather than a routine endpoint patch.
Technical view
CVE-2017-14429 is a CWE-78 command injection in /etc/services/INET/inet_ipv4.php on affected DIR-850L firmware. Shell metacharacters are mishandled while generating DHCP client scripts such as WAN-1-udhcpc.sh, enabling unauthenticated remote code execution as root. CVSS 3.1 is 9.8.
Likely exposure
Exposure is limited to D-Link DIR-850L Rev. A through FW114WWb07_h2ab_beta1 and Rev. B through FW208WWb02. Risk is highest where untrusted DHCP input can reach the router, such as WAN-side DHCP environments or hostile upstream networks.
Exploitation context
The source bundle reports unauthenticated remote code execution as root. It does not include CISA KEV listing, confirmed active exploitation, or validated exploit-in-the-wild evidence. Treat public technical disclosure as raising practical risk, but do not claim active exploitation from these sources alone.
Researcher notes
The provided CVE data identifies command injection in DHCP script generation but does not provide a complete vendor remediation record. Validation should stay focused on model, revision, firmware, and exposure to DHCP input. Avoid assuming broader D-Link product impact without additional sources.
Mitigation direction
- Inventory D-Link DIR-850L Rev. A and Rev. B devices and firmware versions.
- Check D-Link guidance for fixed firmware or replacement recommendations.
- Remove affected routers from high-trust network positions where possible.
- Limit exposure to untrusted DHCP sources where operationally feasible.
- Monitor router configuration, DNS, and traffic-routing changes for compromise indicators.
Validation and detection
- Confirm hardware revision and firmware version from device administration records.
- Compare versions against Rev. A through FW114WWb07_h2ab_beta1 and Rev. B through FW208WWb02.
- Review DHCP client configuration and WAN deployment context for untrusted input paths.
- Check logs and configuration backups for unexpected command, DNS, routing, or startup changes.
- Verify remediation status against current vendor documentation before closing the finding.
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-78: Command execution behavior lookup
Command injection weaknesses can lead defenders to review execution techniques and command interpreter telemetry. 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 lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2017-14429 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
- 9.8 (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:H
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 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:H3.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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.
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.