CVE-2025-63206 is a security vulnerability identified in the web-based management interface of the Dasan Switch DS2924, specifically affecting firmware versions 1.01.18 and 1.02.00. The issue is an authentication bypass that arises due to improper handling of cookies by the web interface. Attackers can craft and store malicious cookies in a victim’s browser, which the switch’s web interface then accepts as valid authentication tokens. This flaw allows attackers to escalate their privileges without needing valid credentials, effectively bypassing authentication controls. The vulnerability targets the management plane of the switch, which is critical for configuring and controlling network traffic. Exploitation could lead to unauthorized configuration changes, network traffic interception, or denial of service. Although no public exploits or patches are currently available, the vulnerability’s nature suggests it could be exploited remotely if an attacker can induce the victim to store the crafted cookie, potentially through phishing or malicious web content. The lack of authentication enforcement on the web interface represents a significant security risk, especially in enterprise and critical infrastructure environments where such switches are deployed. This vulnerability highlights the importance of secure session management and cookie validation in network device web interfaces.

For European organizations, this vulnerability poses a serious risk to network security and operational continuity. Unauthorized access to the Dasan Switch DS2924 management interface could allow attackers to manipulate network configurations, disrupt communications, or intercept sensitive data traversing the network. This could lead to data breaches, service outages, or lateral movement within corporate networks. Critical infrastructure sectors such as telecommunications, energy, and finance that rely on these switches for network management are particularly vulnerable. The authentication bypass could facilitate advanced persistent threats by providing attackers with a foothold in the network. Additionally, the absence of patches increases the window of exposure. The impact extends beyond confidentiality to include integrity and availability of network services, potentially causing widespread operational disruptions. European organizations with limited network segmentation or weak access controls on management interfaces face heightened risks.

1. Immediately restrict access to the Dasan Switch DS2924 management interface to trusted network segments and IP addresses using firewall rules or access control lists (ACLs). 2. Implement network segmentation to isolate management interfaces from general user networks and the internet. 3. Monitor network traffic and web session logs for unusual authentication patterns or unexpected cookie values that could indicate exploitation attempts. 4. Employ web application firewalls (WAFs) or intrusion detection/prevention systems (IDS/IPS) to detect and block malicious cookie injection or abnormal web requests targeting the switch interface. 5. Educate users and administrators about phishing and social engineering risks that could lead to storing malicious cookies. 6. Regularly audit and update firmware and software on network devices; engage with Dasan or vendors for security advisories and patches. 7. Consider deploying multi-factor authentication (MFA) on management interfaces if supported, to add an additional layer of security. 8. If possible, disable web-based management interfaces and use more secure management protocols such as SSH with strong authentication.