CVE-2025-59595 is a denial of service (DoS) vulnerability discovered internally in Absolute Secure Access, a secure remote access solution. The flaw exists in versions prior to 14.12 and is triggered when an attacker sends a specially crafted network packet to a server that is running Secure Access with a non-default configuration. This crafted packet causes the server process to crash, resulting in denial of service and loss of availability of the secure access service. The vulnerability requires no authentication or user interaction, making it remotely exploitable over the network with low attack complexity. The CVSS v4.0 score is 8.2, reflecting the high impact on availability (VA:H) and the fact that no privileges or user interaction are needed. The vulnerability does not affect confidentiality or integrity but can disrupt business operations relying on Secure Access for remote connectivity. No known exploits have been observed in the wild yet, but the potential for disruption is significant, especially in environments where Secure Access is critical for secure communications. The vulnerability is specific to servers configured in non-default modes, which may be common in customized enterprise deployments. Absolute has published the vulnerability details but no direct patch links are provided in the source data; however, upgrading to version 14.12 or later is implied as the remediation.

For European organizations, the primary impact is on the availability of secure remote access services provided by Absolute Secure Access. Disruption of these services can hinder remote workforce connectivity, delay business operations, and potentially impact incident response capabilities. Critical sectors such as finance, healthcare, government, and manufacturing that rely on secure remote access could experience operational downtime. The denial of service could also be leveraged as part of a larger attack chain to distract or delay defenders. Since the vulnerability requires no authentication and can be exploited remotely, attackers can easily cause outages without insider access. Organizations with customized or non-default configurations of Secure Access are at higher risk. The lack of known exploits in the wild reduces immediate risk but does not eliminate the threat, especially as public disclosure may prompt attackers to develop exploits. The impact is thus significant for European enterprises that depend on Absolute Secure Access for secure connectivity, particularly those with remote or hybrid workforces.

1. Immediately upgrade Absolute Secure Access servers to version 14.12 or later where the vulnerability is fixed. 2. Review and document all non-default configurations of Secure Access servers to understand exposure scope. 3. Where possible, revert to default configurations or apply configuration hardening guidelines from Absolute to reduce attack surface. 4. Implement network-level protections such as firewall rules or intrusion prevention systems to detect and block malformed packets targeting Secure Access servers. 5. Monitor network traffic and server logs for unusual packet patterns or crashes indicative of exploitation attempts. 6. Establish incident response procedures to quickly recover from potential denial of service events, including failover and redundancy for Secure Access infrastructure. 7. Coordinate with Absolute support for any additional patches or mitigations and stay updated on threat intelligence related to this CVE. 8. Educate IT staff on the vulnerability specifics to ensure rapid detection and response.