CVE-2026-16876 PUBLISHED

Assigner: NEC
Reserved: 24.07.2026 Published: 07.09.2026 Updated: 07.09.2026

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.

Metrics

CVSS 4.0

CVSS Vector: 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
CVSS Score: 9.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	Low	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	NEC Corporation
Product	UNIVERGE IX-R/IX-V
Versions	Default: unknown Version All versions from Ver1.1 through Ver1.3, All versions from Ver1.4.21 through Ver1.4.28 and Ver1.5.23 is affected

Credits

Kojiro Enokida of Sophos Ltd. reporter

References

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

Problem Types

CWE-306: Missing Authentication for Critical Function CWE