CVE-2025-3508 is a medium-severity vulnerability affecting certain HP DesignJet printers. The vulnerability stems from an information disclosure flaw (CWE-200) in the printer's web interface, which allows unauthenticated remote attackers to access sensitive print job information. Specifically, the flaw enables an attacker to view details about print jobs without any authentication or user interaction, potentially exposing confidential documents or metadata. The vulnerability is remotely exploitable over the network (Attack Vector: Adjacent), requiring no privileges and no user interaction, but it does require the attacker to be on the same local network or connected via a network segment that can reach the printer's web interface. The CVSS 4.0 vector indicates low attack complexity and no need for authentication, with a high impact on confidentiality but no impact on integrity or availability. The affected versions are not explicitly listed here but are referenced in the HP Security Bulletin. No known exploits are currently reported in the wild, but the exposure of sensitive print job data could lead to information leakage, potentially compromising business confidentiality and privacy. The vulnerability is specific to HP DesignJet products, which are widely used in professional environments such as architecture, engineering, and design firms for large-format printing tasks. The flaw arises from insufficient access controls on the printer's web management interface, which should ideally restrict sensitive information to authorized users only.

For European organizations, the impact of this vulnerability can be significant, especially for sectors handling sensitive or proprietary information such as engineering, architecture, government agencies, and legal firms. Exposure of print job data could lead to leakage of intellectual property, confidential client information, or sensitive internal documents. This could result in reputational damage, regulatory non-compliance (e.g., GDPR violations if personal data is exposed), and potential financial losses. Since the vulnerability allows unauthenticated access, attackers within the local network or those who can access the network segment could exploit it without raising immediate suspicion. The risk is heightened in environments where network segmentation is weak or where printers are accessible from less secure network zones. Although the vulnerability does not affect system integrity or availability, the confidentiality breach alone can have serious consequences for organizations relying on HP DesignJet printers for sensitive printing tasks.

To mitigate this vulnerability, European organizations should first consult the official HP Security Bulletin to identify affected printer models and firmware versions and apply any available patches or firmware updates promptly. If patches are not yet available, organizations should restrict access to the printer's web interface by implementing network segmentation and firewall rules to limit access only to trusted management workstations. Disabling the web interface if not required or changing default network configurations to isolate printers from general user networks can reduce exposure. Additionally, enabling authentication mechanisms on the printer's management interface, if supported, can prevent unauthorized access. Regularly auditing printer network accessibility and monitoring for unusual access attempts can help detect exploitation attempts. Organizations should also educate IT staff about the risks of exposing printer management interfaces and incorporate printers into their broader network security policies and vulnerability management programs.