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ZDI-26-526: (0Day) PAX Technology Q80 Application Installer Signature Verification Bypass Remote Code Execution Vulnerability

0
High
Vulnerabilityremoterce
Published: 08/14/2026 (08/14/2026, 05:00:00 UTC)
Source: Zero Day Initiative

Description

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 ZDI has assigned a CVSS rating of 7.5. The following CVEs are assigned: CVE-2026-19910, CVE-2026-19911.

AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 08/12/2026, 20:14:32 UTC

Technical Analysis

The PAX Technology Q80 device contains a vulnerability in its application installer where the cryptographic signature verification is bypassed. This allows network-adjacent attackers to execute arbitrary code remotely without requiring authentication. The vulnerability was reported to the vendor, who confirmed the affected firmware is end-of-life and unsupported. Attempts to clarify impact on supported releases were disputed by the vendor. ZDI disagreed with the vendor's assessment and proceeded to publish the advisory as a zero-day. No patch or official fix is available, and mitigation is limited to restricting product interaction.

Potential Impact

Successful exploitation enables remote code execution with root context on affected PAX Technology Q80 devices without authentication. This can lead to full compromise of the device, including confidentiality, integrity, and availability impacts. The vulnerability is rated with a CVSS score of 7.5 (high severity). There are no known exploits in the wild at the time of disclosure.

Mitigation Recommendations

No official patch or fix is available as the affected firmware is end-of-life and unsupported by the vendor. The vendor advisory and ZDI recommend restricting interaction with the affected product to mitigate risk. Users should consider device replacement or network-level controls to isolate the vulnerable device.

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Technical Details

Classification
{"confidence":0.95,"severitySource":"cvss-text","classifier":"rss-v2"}
Article Source
{"url":"http://www.zerodayinitiative.com/advisories/ZDI-26-526/","fetched":true,"fetchedAt":"2026-08-05T18:41:17.569Z","wordCount":290}

Threat ID: 6a7384d2bf8831d5394acfd5

Added to database: 08/05/2026, 18:45:38 UTC

Last enriched: 08/12/2026, 20:14:32 UTC

Last updated: 09/18/2026, 01:11:53 UTC

Views: 76

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