CVE-2025-59595 is a denial of service (DoS) vulnerability discovered internally in Absolute Secure Access, a product used for secure remote access and network security. The vulnerability affects all versions prior to 14.12. It arises when the server is configured in a non-default manner, allowing an attacker to send a specially crafted network packet that triggers a crash, rendering the server unavailable. The vulnerability is categorized under CWE-20, which relates to improper input validation, indicating that the server fails to properly handle unexpected or malformed input. The CVSS 4.0 base score is 8.2, reflecting a high severity due to the vulnerability's network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N), and a high impact on availability (VA:H). There is no impact on confidentiality or integrity. The vulnerability does not require authentication and can be exploited remotely, making it a significant risk for denial of service attacks. No public exploits have been reported yet, but the ease of exploitation and potential impact on critical services make it a priority for patching. Absolute has released version 14.12 to address this issue, but no direct patch links are provided in the source information. Organizations using Absolute Secure Access should verify their version and configuration to mitigate exposure.

The primary impact of CVE-2025-59595 is denial of service, which can disrupt business operations by causing Secure Access servers to crash and become unavailable. For European organizations, this can affect secure remote access capabilities, potentially interrupting employee connectivity, remote management, and access to critical internal resources. Industries relying heavily on remote access solutions, such as finance, healthcare, and government, may experience operational downtime, leading to productivity loss and potential regulatory compliance issues. The vulnerability’s exploitation does not compromise data confidentiality or integrity but can degrade service availability, which is critical for business continuity. Additionally, organizations with customized or non-default configurations are more susceptible, increasing the risk for entities that have tailored their Secure Access deployments for specific security policies or network environments. The lack of known exploits in the wild provides a window for proactive mitigation, but the high CVSS score and ease of exploitation mean attackers could develop exploits rapidly. Disruptions in secure access infrastructure could also indirectly impact incident response and security monitoring capabilities.

To mitigate CVE-2025-59595, European organizations should immediately upgrade Absolute Secure Access to version 14.12 or later, where the vulnerability is addressed. In parallel, review and audit server configurations to identify and minimize non-default settings that may increase exposure to this vulnerability. Implement network-level protections such as firewall rules or intrusion prevention systems (IPS) to detect and block malformed packets targeting Secure Access servers. Employ network segmentation to isolate critical Secure Access infrastructure from untrusted networks, reducing the attack surface. Regularly monitor logs and network traffic for unusual patterns indicative of attempted exploitation. Establish an incident response plan specifically for denial of service scenarios affecting remote access infrastructure. Coordinate with Absolute support for any additional patches or guidance. Finally, maintain up-to-date asset inventories to ensure all instances of Secure Access are identified and remediated promptly.