Overview
A critical vulnerability has been discovered in 70mai M300 up to version 20250611, affecting components of its Telnet service. This vulnerability is potentially hazardous to any organization using the affected versions of this product, as it opens up the potential for system compromise and data leakage. This vulnerability is particularly concerning as it has been disclosed to the public and thus, malicious actors may be aware of and actively exploiting this weakness.
Vulnerability Summary
CVE ID: CVE-2025-6529
Severity: Critical (8.8 CVSS score)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: System compromise or data leakage due to use of default credentials in Telnet service
Affected Products
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Product | Affected Versions
70mai M300 | Up to 20250611
How the Exploit Works
The vulnerability arises from the Telnet service within the 70mai M300 product. This service, intended for remote administration of the device, is configured with default credentials, which are not enforced to be changed upon installation or setup. As such, an attacker who gains network access can simply use these default credentials to gain control of the device. This manipulation allows for an unauthorized user to potentially compromise the system and leak sensitive data.
Conceptual Example Code
Here’s a conceptual example of how an attacker might exploit this vulnerability via a simple Telnet command:
telnet target_device_ip
Trying target_device_ip...
Connected to target_device_ip.
Escape character is '^]'.
login: default_username
password: default_password
# Now the attacker has control over the deviceMitigation Guidance
The primary mitigation for this vulnerability is to apply the vendor-provided patch when it becomes available. In the absence of an immediate patch, it is recommended to use Web Application Firewalls (WAFs) or Intrusion Detection Systems (IDS) as temporary measures to detect and prevent possible attacks. Furthermore, if possible, the default credentials should be changed immediately to prevent unauthorized access.
In the meantime, users are encouraged to monitor their systems for any signs of suspicious activity, and to remain vigilant about updates from the vendor regarding this issue. It is also advisable to isolate the affected devices from the network, or place them behind a firewall until the patch is applied.