CVE-2025-9358 in RE6250
Summary
by MITRE • 08/23/2025
A security flaw has been discovered in Linksys RE6250, RE6300, RE6350, RE6500, RE7000 and RE9000 1.0.013.001/1.0.04.001/1.0.04.002/1.1.05.003/1.2.07.001. This vulnerability affects the function setSysAdm of the file /goform/setSysAdm. The manipulation of the argument admpasshint results in stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been released to the public and may be exploited. The vendor was contacted early about this disclosure but did not respond in any way.
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Analysis
by VulDB Data Team • 09/03/2025
This vulnerability resides within the Linksys wireless router firmware versions 1.0.013.001 through 1.2.07.001 affecting multiple models including RE6250, RE6300, RE6350, RE6500, RE7000, and RE9000. The flaw manifests in the setSysAdm function located at /goform/setSysAdm which handles administrative password hint parameters. The specific vulnerability is a stack-based buffer overflow that occurs when processing the admpasshint argument, representing a critical security weakness that allows remote code execution. This type of vulnerability falls under CWE-121 Stack-based Buffer Overflow, which is classified as a serious weakness in software design that can lead to arbitrary code execution and system compromise.
The technical exploitation of this vulnerability enables attackers to remotely manipulate the router's memory structure by overflowing the stack buffer allocated for the admpasshint parameter. This allows malicious actors to overwrite adjacent memory locations including return addresses and function pointers, potentially enabling them to execute arbitrary code with administrative privileges. The remote attack vector means that no physical access or local network presence is required to exploit this vulnerability, making it particularly dangerous for home and enterprise networks. The public availability of exploit code significantly increases the risk profile, as demonstrated by the vendor's lack of response to early disclosure attempts.
The operational impact of this vulnerability extends beyond simple privilege escalation to encompass complete network compromise and potential data exfiltration. An attacker who successfully exploits this vulnerability can gain full administrative control over the affected routers, enabling them to modify network configurations, intercept traffic, create backdoors, and potentially use the compromised devices as entry points for further attacks within the network. This vulnerability directly maps to attack techniques described in the MITRE ATT&CK framework under T1059 Command and Scripting Interpreter and T1021 Remote Services, as it allows for remote command execution and network service manipulation. The affected devices become potential botnet candidates for distributed denial-of-service attacks or as pivoting points for lateral movement within corporate networks.
Mitigation strategies should include immediate firmware updates from Linksys if available, though the vendor's lack of response complicates this approach. Network segmentation and firewall rules can help limit the potential impact by restricting access to the affected router management interfaces. Implementing intrusion detection systems to monitor for unusual traffic patterns on management ports and conducting regular security assessments of network infrastructure are recommended defensive measures. Organizations should also consider disabling unnecessary services and implementing strong authentication mechanisms to reduce the attack surface. The vulnerability highlights the importance of firmware security and the need for vendors to maintain responsive security disclosure processes to protect users from publicly available exploits.