CVE-2025-11542 is a stack-based buffer overflow vulnerability (CWE-121) identified in a broad range of Sharp Display Solutions projector models, including NP-P502HL-2, NP-P502WL-2, NP-P502HLG-2, and many others. This vulnerability exists in all versions of the affected products and allows an unauthenticated remote attacker to execute arbitrary code by sending specially crafted network packets to the projector. The buffer overflow occurs due to improper bounds checking on input data processed by the projector's firmware, leading to memory corruption on the stack. Successful exploitation can result in arbitrary command execution, potentially allowing attackers to take full control of the device, disrupt projector functionality, or pivot into connected networks. The CVSS 4.0 vector indicates network attack vector (AV:N), low attack complexity (AC:L), no user interaction (UI:N), no privileges required (PR:N), partial impact on integrity and availability, and high impact on confidentiality. No patches or exploits are currently publicly available, but the vulnerability is considered critical given the potential for remote code execution without authentication. The affected projectors are commonly used in corporate, educational, and public sector environments, making this a significant security concern.

For European organizations, the impact of CVE-2025-11542 is substantial. Exploitation could lead to unauthorized remote control of projectors, allowing attackers to disrupt presentations, exfiltrate sensitive information displayed or processed by the devices, or use compromised projectors as footholds for lateral movement within internal networks. This is particularly concerning in sectors such as government, finance, education, and healthcare, where these devices are prevalent and network security is critical. The high confidentiality impact suggests potential leakage of sensitive data, while availability impact could disrupt business operations relying on these projectors. Additionally, compromised projectors could be leveraged to launch further attacks against connected systems. The lack of authentication and user interaction requirements lowers the barrier for attackers, increasing the risk of exploitation in environments where these devices are exposed to untrusted networks or insufficiently segmented.

1. Immediately restrict network access to projector management interfaces by implementing strict firewall rules and network segmentation to isolate projectors from untrusted networks. 2. Monitor network traffic for unusual or malformed packets targeting projector IP addresses, which may indicate exploitation attempts. 3. Disable any unnecessary network services or remote management features on the affected projectors to reduce the attack surface. 4. Engage with Sharp Display Solutions for firmware updates or patches addressing CVE-2025-11542 and apply them promptly once available. 5. Conduct regular security assessments of audiovisual equipment and integrate projector security into broader IT asset management and vulnerability management programs. 6. Educate IT and security teams about this vulnerability to ensure rapid detection and response to potential incidents. 7. Consider deploying network intrusion detection/prevention systems (IDS/IPS) with signatures targeting exploitation attempts of this vulnerability.