D-Link DIR-2640 DestNetwork Command Injection Remote Code Execution Vulnerability
Description
D-Link DIR-2640 DestNetwork Command Injection Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DIR-2640 routers. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed.
The specific flaw exists within the handling of the DestNetwork parameter provided to the HNAP1 endpoint. The issue results from the lack of proper validation of a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code in the context of root. . Was ZDI-CAN-19548.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
D-Link DIR-2640 routers (firmware v1.11B02 and below) have a command injection in DestNetwork parameter of HNAP1, allowing authenticated network-adjacent attackers to execute arbitrary code as root.
Vulnerability
The vulnerability exists in the HNAP1 endpoint handling of the DestNetwork parameter. D-Link DIR-2640 routers with firmware versions v1.11B02 and v1.11B02 Beta01 (and below) lack proper validation of user input before using it in a system call, leading to command injection. Authentication is required but can be bypassed via separate authentication bypass vulnerabilities (e.g., ZDI-CAN-19549) [1][2].
Exploitation
An attacker must be network-adjacent and authenticated (or bypass authentication) to send a crafted HTTP request to the HNAP1 endpoint with a malicious DestNetwork parameter. The injected command is executed in the context of root. The attack does not require user interaction [2].
Impact
Successful exploitation allows an attacker to execute arbitrary commands as root, leading to full compromise of the router's confidentiality, integrity, and availability. This can include installing persistent malware, exfiltrating data, or disrupting network services [1][2].
Mitigation
D-Link has released firmware version v1.11B02_Beta_Hotfix to address this vulnerability, as per the advisory [1]. Users should update to the latest firmware. No workaround is mentioned. The product may be end-of-life; users are advised to check D-Link support for the latest status [1].
AI Insight generated on May 26, 2026. Synthesized from this CVE's description and the cited reference URLs; citations are validated against the source bundle.
Affected products
2Patches
0No patches discovered yet.
Vulnerability mechanics
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References
2- supportannouncement.us.dlink.com/announcement/publication.aspxmitrevendor-advisory
- www.zerodayinitiative.com/advisories/ZDI-23-543/mitrex_research-advisory
News mentions
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