CVE-2026-19910 in Q80
Summary
by MITRE • 08/14/2026
PAX Technology Q80 Application Installer Signature Verification Bypass Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of PAX Technology Q80. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the application installer. The issue results from the lack of proper verification of a cryptographic signature before installing an application. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of root. Was ZDI-CAN-30585.
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Analysis
by VulDB Data Team • 08/14/2026
This vulnerability represents a critical security flaw in PAX Technology Q80 devices that enables remote code execution through a signature verification bypass mechanism. The weakness resides in the application installer component where cryptographic signature validation is insufficiently implemented, allowing malicious payloads to be installed without proper authentication or integrity checking. Security researchers have identified this issue as ZDI-CAN-30585, highlighting its severity and potential impact on affected systems. The vulnerability's classification aligns with CWE-311, which addresses the absence of cryptographic protection for sensitive data, while also mapping to ATT&CK technique T1059.007 for remote code execution through application installation processes.
The technical implementation of this flaw stems from improper certificate validation within the installer's authentication framework. When applications are installed on affected Q80 devices, the system fails to properly verify digital signatures before proceeding with the installation process. This creates an attack surface where network-adjacent adversaries can craft malicious installation packages that appear legitimate to the device's security mechanisms. The lack of authentication requirements means that exploitation can occur without any prior credentials or privileged access, making this vulnerability particularly dangerous as it requires minimal attacker privileges to achieve system compromise. The installer's failure to validate cryptographic signatures represents a fundamental breakdown in the device's security architecture, potentially allowing attackers to execute arbitrary code with the highest possible system privileges.
The operational impact of this vulnerability extends beyond simple code execution capabilities, as successful exploitation can result in complete system compromise and potential lateral movement within network environments. Attackers leveraging this flaw can gain root-level access to affected devices, enabling them to modify system configurations, install persistent backdoors, or extract sensitive data from the device's storage. The implications are particularly severe for point-of-sale systems where Q80 devices are commonly deployed, as these installations often contain sensitive financial transaction data and customer information. Organizations using PAX Technology Q80 devices face significant risk of unauthorized access and potential data breaches when this vulnerability remains unpatched.
Mitigation strategies should focus on immediate patch deployment from PAX Technology to address the signature verification bypass issue. Security teams must implement network segmentation to limit adjacent network access to affected devices, reducing the attack surface for exploitation attempts. Additional protective measures include monitoring network traffic for suspicious installation patterns and implementing strict application whitelisting policies where possible. Organizations should also conduct comprehensive vulnerability assessments to identify all instances of Q80 devices within their networks and ensure proper patch management procedures are in place. The remediation process must include thorough testing of patches to prevent operational disruptions while maintaining security integrity. Regular security audits should verify that signature verification mechanisms function correctly after patch installation, ensuring continued protection against similar vulnerabilities in the future.