What is CVE-2026-19908?

CVE-2026-19908 is a high-severity vulnerability in Pax Technology Q80, classified under Missing Authentication for Critical Function. CVSS score: 7.1/10. Published 2026-08-14.

How severe is CVE-2026-19908?

High severity. CVSS v3 base score is 7.1 out of 10.

Auth bypass in Pax Technology Q80

CVE-2026-19908

PAX Technology Q80 XCB Daemon Missing Authentication Vulnerability. This vulnerability allows network-adjacent attackers to disclose sensitive information and modify configuration on affected installations of PAX Technology Q80. Authentication is not required to exploit this vulnerability. The specific flaw exists within the XCB daemon. The issue results from the lack of authentication prior to allowing access to functionality. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of root. Was ZDI-CAN-30584.

Vulnerability class: Broken Authentication

Published 2026-08-14 · last modified 2026-09-01.

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N.

EPSS exploit prediction

EPSS: 0.004 (27.1th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 27th percentile — 27.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.001

Affected products

Pax Technology Q80 — versions 2.6.33.6690R

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

www.zerodayinitiative.com/advisories/ZDI-26-524/ (x_research-advisory)

Frequently asked questions

What is CVE-2026-19908?: CVE-2026-19908 is a high-severity vulnerability in Pax Technology Q80, classified under Missing Authentication for Critical Function. CVSS score: 7.1/10. Published 2026-08-14.
How severe is CVE-2026-19908?: High severity. CVSS v3 base score is 7.1 out of 10.