Overview
In the world of cybersecurity, vulnerabilities are inescapable. The most recent one to hit the headlines is CVE-2025-9359, a significant weakness identified in various Linksys Wireless Range Extenders. This vulnerability is particularly concerning due to its high severity score, the ability for it to be initiated remotely, and the potential for system compromise or data leakage. This vulnerability poses a serious risk to both individual users and businesses alike, emphasizing the importance of addressing it promptly.
Vulnerability Summary
CVE ID: CVE-2025-9359
Severity: High (CVSS 8.8)
Attack Vector: Remote
Privileges Required: None
User Interaction: No user interaction is required
Impact: Potential system compromise or data leakage
Affected Products
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Product | Affected Versions
Linksys RE6250 | 1.0.013.001
Linksys RE6300 | 1.0.04.001
Linksys RE6350 | 1.0.04.002
Linksys RE6500 | 1.1.05.003
Linksys RE7000 | 1.2.07.001
Linksys RE9000 | 1.0.013.001
How the Exploit Works
The vulnerability lies in the RP_checkCredentialsByBBS function in the file /goform/RP_checkCredentialsByBBS of the affected Linksys devices. Exploitation occurs when the argument ssidhex/pwd in the function is manipulated, leading to a stack-based buffer overflow. A buffer overflow can allow an attacker to overwrite data, execute code, or cause a system crash. In this case, the vulnerability can be exploited remotely, which increases its potential impact significantly.
Conceptual Example Code
Below is a hypothetical example of a malicious payload that could exploit this vulnerability. This should not be used for malicious purposes but is provided to help understand the nature of the vulnerability.
POST /goform/RP_checkCredentialsByBBS HTTP/1.1
Host: target.example.com
Content-Type: application/json
{ "ssidhex": "OVERFLOW_PAYLOAD", "pwd": "OVERFLOW_PAYLOAD" }In this example, `OVERFLOW_PAYLOAD` would be replaced with a specifically crafted string of data that would cause the buffer overflow when processed by the vulnerable function.
Mitigation Actions
Given the severity of this vulnerability, immediate action is recommended. Users are advised to apply vendor patches as soon as they are available. In the meantime, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can provide temporary mitigation. However, these measures are not foolproof and may not protect against all potential exploits.
Remember, staying vigilant and proactive in addressing vulnerabilities is crucial in maintaining a secure digital environment. Keep an eye on updates from Linksys and ensure your systems are updated as soon as patches become available.