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Vulnerability record · CVE-2026-16876 · published 7 September 2026

CVE-2026-16876: Missing authentication for critical function vulnerability

An authentication bypass vulnerability exists in the WebGUI of Series UNIVERGE IX-R/IX-V. A user could bypass authentication and execute arbitrary CLI commands by tampering with WebGUI messages and sending them to the device via internet.

9.3 CVSS 4.0 Critical EPSS 0.33% · top 76.3% CWE-306 · Missing authentication for critical function Deferred
9.3CVSS 4.0 base score
0.33%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
1References
9 Sep 2026Last modified by NVD

Description

An authentication bypass vulnerability exists in the WebGUI of Series UNIVERGE IX-R/IX-V. A user could bypass authentication and execute arbitrary CLI commands by tampering with WebGUI messages and sending them to the device via internet.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://jpn.nec.com/security-info/secinfo/nv26-005_en.html

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Source: NIST National Vulnerability Database (record CVE-2026-16876), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.