Auth bypass in Aten Unizon
CVE-2026-5057
ATEN Unizon RpcProvider Missing Authentication Denial-of-Service Vulnerability. This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of ATEN Unizon. Authentication is not required to exploit this vulnerability. The specific flaw exists within the RpcProvider class. The issue results from the lack of authentication prior to allowing access to functionality. An attacker can leverage this vulnerability to create a denial-of-service condition on the system. Was ZDI-CAN-29041.
Vulnerability class: Broken Authentication
EPSS: 0.005 (40.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Aten Unizon — versions 2.6.253.001
Weakness classification (CWE)
References
- zdi-disclosures@trendmicro.com (x_research-advisory)
- zdi-disclosures@trendmicro.com (vendor-advisory)
Frequently asked questions
- What is CVE-2026-5057?
- CVE-2026-5057 is a high-severity vulnerability in Aten Unizon, classified under Missing Authentication for Critical Function. CVSS score: 7.5/10. Published 2026-07-29.
- How severe is CVE-2026-5057?
- High severity. CVSS v3 base score is 7.5 out of 10.