CVE-2025-65081 is a security vulnerability classified as CWE-125 (Out-of-bounds Read) affecting the Postscript interpreter component in a broad range of Lexmark printer models, including MXTCT, MSNGM, MSTGM, and many others. The flaw arises when the interpreter improperly handles memory boundaries during Postscript processing, allowing an attacker to read memory outside the allocated buffer. This memory disclosure can be leveraged to execute arbitrary code with unprivileged user rights, potentially enabling further compromise of the device or lateral movement within a network. The vulnerability requires no authentication or user interaction, increasing its risk profile. The CVSS 4.0 vector indicates network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N), and impacts on confidentiality, integrity, and availability at low to low-medium levels (VC:L, VI:L, VA:L). Despite the medium severity score of 6.9, the broad range of affected devices and the ability to execute code remotely make this a significant concern. Currently, no patches or known exploits are publicly available, but the vulnerability is officially published and reserved since late 2025. Organizations relying on these Lexmark devices should prepare for imminent remediation and consider interim protective measures.

For European organizations, the impact of CVE-2025-65081 could be substantial depending on the deployment scale of affected Lexmark printers. Successful exploitation may allow attackers to execute arbitrary code on printers, potentially leading to unauthorized access to sensitive print jobs, disruption of printing services, or pivoting into internal networks. This could compromise confidentiality of printed documents, integrity of device operations, and availability of printing infrastructure. Sectors such as government, finance, healthcare, and critical infrastructure that rely heavily on secure printing workflows are particularly vulnerable. The vulnerability's network-exploitable nature means attackers can target exposed printers remotely, increasing the attack surface. Additionally, unpatched devices could be used as entry points for broader cyberattacks, including espionage or ransomware campaigns. The lack of current exploits reduces immediate risk but also means organizations must be proactive in mitigation to avoid future exploitation.

1. Immediately inventory and identify all affected Lexmark printer models within the organization. 2. Restrict network access to printers by implementing strict firewall rules and network segmentation, isolating printers from critical systems and the internet. 3. Disable or limit Postscript processing features on printers if operationally feasible to reduce attack surface. 4. Monitor vendor communications closely for official patches or firmware updates and apply them promptly once available. 5. Employ network intrusion detection systems (NIDS) to detect anomalous traffic targeting printer protocols. 6. Enforce strong access controls on printer management interfaces, including multi-factor authentication where supported. 7. Regularly audit printer logs for suspicious activity indicative of exploitation attempts. 8. Educate IT and security teams about this vulnerability to ensure rapid response capability. 9. Consider deploying endpoint detection and response (EDR) solutions that can monitor unusual printer behavior. 10. Develop incident response plans specific to printer compromise scenarios.