CVE-2025-8829 in RE6250
Summary
by MITRE • 08/11/2025
A vulnerability was identified in Linksys RE6250, RE6300, RE6350, RE6500, RE7000 and RE9000 up to 20250801. Affected by this vulnerability is the function um_red of the file /goform/RP_setBasicAuto. The manipulation of the argument hname leads to os command injection. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
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Analysis
by VulDB Data Team • 09/04/2025
This vulnerability exists within several Linksys router models including RE6250, RE6300, RE6350, RE6500, RE7000, and RE9000 versions up to 20250801 firmware release. The flaw is located in the um_red function within the /goform/RP_setBasicAuto file which handles basic auto configuration settings. The specific technical weakness occurs when processing the hname argument parameter, creating an operating system command injection vulnerability that allows malicious actors to execute arbitrary commands on the affected devices. This represents a critical security flaw that enables remote code execution capabilities without requiring authentication or physical access to the network infrastructure.
The vulnerability stems from inadequate input validation and sanitization within the web interface form handling mechanism. When a remote attacker sends a specially crafted request containing malicious commands within the hname parameter, the system fails to properly escape or filter the input before passing it to underlying operating system commands. This allows attackers to inject arbitrary shell commands that execute with the privileges of the web server process, typically running with administrative privileges on the router. The vulnerability directly maps to CWE-77 which defines improper neutralization of special elements used in OS commands, and aligns with ATT&CK technique T1059.001 for command and scripting interpreter. The attack surface is particularly concerning as it enables full system compromise through a remote web interface without requiring any prior authentication credentials.
The operational impact of this vulnerability extends beyond simple remote code execution to encompass complete network infrastructure compromise. An attacker could potentially gain access to the internal network, perform man-in-the-middle attacks, modify router configurations, establish persistent backdoors, or use the compromised device as a pivot point for attacking other systems within the local network. The public disclosure of the exploit increases the risk significantly as threat actors can immediately leverage this vulnerability without requiring advanced exploitation techniques. The fact that the vendor did not respond to early disclosure attempts leaves affected organizations without official patches or mitigation guidance, creating a window of opportunity for malicious actors to exploit this weakness. The vulnerability affects enterprise and consumer networks simultaneously, making it particularly dangerous as it could be exploited against both small home networks and large corporate infrastructures.
Organizations should immediately implement network segmentation to isolate affected devices from critical systems and apply network-based firewalls to block access to the vulnerable web interface ports. The most effective immediate mitigation involves disabling the web management interface or implementing strict access controls that require strong authentication and encryption. Network monitoring should be enhanced to detect unusual traffic patterns that might indicate exploitation attempts. The vendor should be urged to provide a timely firmware update that properly sanitizes input parameters and implements proper command escaping mechanisms. Additionally, network administrators should consider implementing intrusion detection systems that can identify attempts to exploit this specific vulnerability pattern. The lack of vendor response underscores the importance of maintaining awareness of publicly disclosed vulnerabilities and implementing proactive security measures even when vendors fail to respond promptly to security concerns.