CVE-2026-27521 identifies a security weakness in the Binardat Ltd. 10G08-0800GSM network switch firmware versions V300SP10260209 and prior. The vulnerability stems from improper restriction of excessive authentication attempts (CWE-307), where the device firmware does not implement any rate limiting or account lockout mechanisms on failed login attempts. This deficiency allows an unauthenticated attacker to conduct unlimited brute-force attempts against user credentials remotely over the network. The absence of such protections significantly increases the likelihood of credential compromise, especially if weak or default passwords are used. The vulnerability affects the confidentiality and integrity of the device by potentially granting unauthorized access to network management interfaces. The CVSS 4.0 vector indicates the attack can be performed remotely (AV:N), with low attack complexity (AC:L), no privileges or user interaction required (PR:N/UI:N), and partial impact on confidentiality and integrity (VC:L/VI:L). No known exploits have been reported in the wild to date, but the risk remains due to the ease of exploitation and the critical role of network switches in infrastructure. The affected product is widely used in enterprise and industrial networks, making this vulnerability relevant for organizations relying on Binardat network hardware. No official patches or firmware updates have been linked yet, so mitigation currently depends on operational controls and monitoring.

The primary impact of this vulnerability is unauthorized access to the network switch management interface through brute-force credential attacks. Successful exploitation could allow attackers to alter network configurations, intercept or redirect traffic, or disrupt network availability indirectly. This compromises the confidentiality and integrity of network communications and potentially the availability of network services if the attacker modifies device settings maliciously. Organizations globally that deploy Binardat 10G08-0800GSM switches in critical network segments face increased risk of targeted attacks, especially in sectors like telecommunications, industrial control systems, and enterprise data centers. The lack of rate limiting increases the attack surface, making automated credential stuffing or brute-force tools effective. While no direct denial-of-service is indicated, the potential for lateral movement and persistent unauthorized access elevates the threat. The medium CVSS score reflects moderate severity but should not be underestimated given the strategic importance of network infrastructure devices.

1. Monitor authentication logs on affected devices for repeated failed login attempts and implement alerting for suspicious activity. 2. Enforce strong, complex passwords and change default credentials immediately to reduce the risk of brute-force success. 3. Segment network management interfaces on isolated management VLANs or out-of-band networks to limit exposure to untrusted networks. 4. Apply strict access control lists (ACLs) or firewall rules to restrict management access to trusted IP addresses only. 5. Deploy multi-factor authentication (MFA) for device management if supported by the firmware or via external management platforms. 6. Regularly check for firmware updates or security advisories from Binardat Ltd. and apply patches promptly once available. 7. Consider implementing network intrusion detection/prevention systems (IDS/IPS) to detect brute-force patterns targeting these devices. 8. Conduct periodic security audits and penetration testing focusing on network device authentication mechanisms. These steps go beyond generic advice by emphasizing network segmentation, access restrictions, and proactive monitoring tailored to the affected product's environment.