Overview
A critical vulnerability, CVE-2025-45985, has been discovered in several models of Blink routers. This vulnerability exposes a significant risk to both individuals and businesses, as it could potentially lead to system compromise or data leakage. Blink routers are widely used around the globe, hence the discovery of this vulnerability is of considerable concern to the cybersecurity community.
The vulnerability lies within the bs_SetSSIDHide function and is classified as a command injection vulnerability. Command injection vulnerabilities are particularly dangerous, as they allow attackers to execute arbitrary commands on the host operating system, which can lead to a full system compromise.
Vulnerability Summary
CVE ID: CVE-2025-45985
Severity: Critical (CVSS: 9.8)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: System compromise or data leakage
Affected Products
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Product | Affected Versions
Blink BL-WR9000 | V2.4.9
Blink BL-AC2100_AZ3 | V1.0.4
Blink BL-X10_AC8 | v1.0.5
Blink BL-LTE300 | v1.2.3
Blink BL-F1200_AT1 | v1.0.0
Blink BL-X26_AC8 | v1.2.8
Blink BLAC450M_AE4 | v4.0.0
Blink BL-X26_DA3 | v1.2.7
How the Exploit Works
The vulnerability is a command injection flaw within the bs_SetSSIDHide function. This function is vulnerable because it fails to properly sanitize user-supplied input. An attacker can leverage this flaw to inject and execute arbitrary shell commands on the host system, potentially leading to a complete system compromise or data leakage.
Conceptual Example Code
Below is a conceptual example of exploiting this vulnerability. The attacker sends a malicious payload via an HTTP POST request to the vulnerable endpoint.
POST /bs_SetSSIDHide HTTP/1.1
Host: target.example.com
Content-Type: application/json
{ "ssid": "; rm -rf /;" }In this example, the attacker is injecting a shell command (`rm -rf /`) which, if executed, will delete all files on the target system. Please note that this is a highly destructive command and is used here purely for illustrative purposes.
Mitigation
It is recommended to apply the security patch provided by the vendor as soon as possible. In case the patch cannot be immediately applied, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can provide temporary mitigation. They should be configured to detect and block command injection attempts.