CVE-2025-61915 – CUPS Web Configuration Bug Enables DoS and Possible RCE
Category:Vulnerabilities & Exploits
CVE-2025-61915 in the Common Unix Printing System (CUPS) allows crafted configuration input via the web administration interface (port 631) to cause denial-of-service and potentially execute code with administrator privileges. The vulnerability stems from improper memory handling when processing malformed requests through the web config tool—under certain conditions enabling remote code execution. Ubuntu issued security notices (USN-7897-1) patching all supported releases from 16.04 LTS through 25.10. The advisory also bundles CVE-2025-58436, a separate CUPS vulnerability. What's notable: CUPS is deployed on millions of Linux systems that expose network printing administration, making this a broad attack surface across enterprise and cloud environments. The web-based admin interface is a common target for reconnaissance—attackers probing port 631 can now attempt exploitation to gain privileged access.
CORTEX Protocol Intelligence Assessment
Business Impact: CVE-2025-61915 threatens the availability and potential integrity of CUPS-based print infrastructure across multiple Linux distributions, risking operational delays and providing attackers a launchpad for lateral movement. In regulated environments, compromise of shared infrastructure through CUPS could contribute to broader security incidents with compliance consequences.
Strategic Intelligence Guidance
- Apply vendor security updates for CUPS addressing CVE-2025-61915 and CVE-2025-58436 across all supported Linux distributions and verify upgraded versions via package management tools.
- Restrict access to the CUPS web configuration interface to administrative networks or jump hosts and require strong authentication for any configuration changes.
- Segment print servers away from domain controllers and critical application servers, and ensure least-privilege service accounts are used for cupsd processes.
- Incorporate CUPS into routine vulnerability scanning and log monitoring, watching for repeated service crashes, abnormal configuration changes, or suspicious access patterns.
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Intelligence Source: CVE-2025-61915 – CUPS Web Configuration Bug Enables DoS and Possible RCE | Nov 28, 2025