CVE-2025-1549 is a command injection vulnerability classified under CWE-77, found in the WatchGuard Mobile VPN with SSL client for Windows, version 12.0. The flaw stems from improper neutralization of special characters in command inputs, which allows a local user with limited privileges to execute arbitrary commands with elevated system privileges. This vulnerability effectively enables local privilege escalation, potentially allowing attackers to gain administrative control over the affected Windows system. It represents an additional unmitigated attack path related to the previously identified CVE-2024-4944, indicating a broader security concern within the product's command handling mechanisms. The vulnerability does not require user interaction or authentication beyond local access, increasing its risk in environments where local user accounts may be compromised or shared. The vendor has addressed this issue in version 12.11.5 of the Mobile VPN with SSL client. The CVSS 4.0 vector (AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H) reflects a medium severity rating with high scope impact, highlighting the potential for significant system compromise if exploited. No public exploits or active attacks have been reported to date, but the vulnerability's nature warrants prompt remediation.

If exploited, this vulnerability allows a local attacker to escalate privileges on Windows systems running the vulnerable WatchGuard Mobile VPN with SSL client. This can lead to full system compromise, enabling attackers to install malware, alter system configurations, access sensitive data, or disrupt availability. The impact is particularly critical in enterprise environments where VPN clients are widely deployed to provide secure remote access. Attackers gaining elevated privileges could bypass security controls, move laterally within networks, and compromise critical infrastructure. Although exploitation requires local access, environments with shared or weakly controlled user accounts are at higher risk. The vulnerability also compounds risks associated with CVE-2024-4944, potentially enabling chained attacks. Organizations relying on this VPN client for secure connectivity could face significant operational and reputational damage if this vulnerability is exploited.

1. Upgrade the WatchGuard Mobile VPN with SSL client on Windows to version 12.11.5 or later, where this vulnerability is patched. 2. Restrict local user permissions rigorously to minimize the number of users with local access, reducing the attack surface. 3. Implement application whitelisting and endpoint protection solutions to detect and block unauthorized command execution attempts. 4. Monitor system logs for unusual command execution patterns or privilege escalation attempts related to the VPN client. 5. Enforce strong access controls and use multi-factor authentication for local accounts to prevent unauthorized access. 6. Conduct regular vulnerability assessments and penetration testing focusing on local privilege escalation vectors. 7. Educate users about the risks of local account compromise and enforce policies to prevent sharing of credentials. 8. Consider network segmentation to limit the impact of compromised endpoints running the vulnerable client.