Unauthenticated Remote Command Execution in D-Link DIR-859 Router
CVE-2019-17621

9.8CRITICAL

Key Information:

Vendor: D-Link
Status: Dir-859 Firmware
Vendor: CVE Published:; 30 December 2019

Badges

👾 Exploit Exists🟡 Public PoC🟣 EPSS 92%🦅 CISA Reported

Summary

The D-Link DIR-859 Wi-Fi router has a vulnerability that allows remote attackers to execute system commands as root without authentication. This issue is triggered by sending a specially crafted HTTP SUBSCRIBE request to the UPnP service after connecting to the local network. This vulnerability could potentially allow unauthorized users to exploit the router's configuration, posing risks to network integrity and user data.

CISA Reported

CISA provides regional cyber and physical services to support security and resilience across the United States. CISA monitor the most dangerious vulnerabilities and have identifed as being exploited but is not known by the CISA to be used in ransomware campaigns. This is subject to change at pace

The CISA's recommendation is: Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.