The web interface of multiple D-Link routers, including DIR-600 rev B (≤2.14b01) and DIR-300 rev B (≤2.13), contains an unauthenticated OS command injection vulnerability in command.php, which improperly handles the cmd POST parameter. A remote attacker can exploit this flaw without authentication to spawn a Telnet service on a specified port, enabling persistent interactive shell access as root.
Security readout for executives and security teams
Plain-English summary
This CVE describes a critical unauthenticated remote command execution flaw in legacy D-Link DIR-600 rev B and DIR-300 rev B routers. An attacker reaching the web interface could gain root-level interactive access. The bundle shows public exploit references, but does not show CISA KEV listing or confirmed active exploitation.
Executive priority
Treat as urgent for any exposed legacy D-Link routers. The business risk is full device takeover at the network edge with no login required. If affected devices exist, remove exposure now and plan replacement or vendor-supported remediation.
Technical view
The vulnerable web interface improperly handles the command.php cmd POST parameter, enabling OS command injection without authentication. The source description says exploitation can start a Telnet service on an attacker-selected port and provide persistent root shell access. Affected versions named are DIR-600 rev B through 2.14b01 and DIR-300 rev B through 2.13.
Likely exposure
Highest exposure is legacy DIR-600 rev B or DIR-300 rev B devices with their web interface reachable from untrusted networks. Internal-only devices still matter if attackers gain network access. The bundle lacks reliable CPEs and has sparse structured affected-version metadata, so asset inventory is essential.
Exploitation context
Public exploit references are included, including Metasploit and Exploit-DB entries. That supports exploit availability, not active exploitation. The CVE bundle marks KEV as false, and no cited source in the bundle confirms current in-the-wild exploitation.
Researcher notes
The bundle is strong on vulnerability mechanics and public exploit availability, but incomplete for vendor remediation. Structured affected data contains no CPEs and unhelpful version entries, while the description provides specific affected firmware ranges. Avoid asserting active exploitation without additional evidence.
Mitigation direction
Identify and prioritize any DIR-600 rev B or DIR-300 rev B devices.
Remove web management exposure from the internet immediately.
Restrict management access to trusted networks or VPN only.
Check D-Link guidance for supported firmware or replacement direction.
Replace unsupported legacy routers where no maintained fix exists.
Investigate and remove unexpected Telnet exposure on affected devices.
Validation and detection
Inventory router model, hardware revision, and firmware version.
Confirm whether web management is reachable from untrusted networks.
Review device configuration for unexpected Telnet services.
Check network monitoring for unauthorized management access attempts.
Compare findings against D-Link or trusted advisory guidance.
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Potential ATT&CK relevance
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 · medium confidence lookup
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.
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.
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.
1CVSS vectors
3Timeline events
1ADP providers
5Source links
SSVC decision data
CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: pocAutomatable: yesTechnical Impact: total
CVSS vector scores
1 official score
We 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.
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
CWE-78 · source CWE mapping
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.