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CVE-2026-16876

Quick assessment

Affected
NEC Corporation UNIVERGE IX-R/IX-V
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

NEC UNIVERGE IX-R/IX-V是日本NEC公司的一款面向企业的融合通信网关设备。 NEC UNIVERGE IX-R/IX-V Ver1.1至Ver1.3版本、Ver1.4.21至Ver1.4.28版本和Ver1.5.23版本存在授权问题漏洞，该漏洞源于WebGUI身份验证绕过问题，可能导致攻击者篡改WebGUI消息并通过互联网发送到设备，绕过身份验证并执行任意CLI命令。

CVSS 9.3 · Critical EPSS 0.33% · P25

Affected Version Matrix 1

VendorProduct Version RangeStatus
NEC Corporation UNIVERGE IX-R/IX-V All versions from Ver1.1 through Ver1.3, All versions from Ver1.4.21 through Ver1.4.28 and Ver1.5.23 affected
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I. Basic Information for CVE-2026-16876

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
NEC UNIVERGE IX-R/IX-V 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
NEC UNIVERGE IX-R/IX-V是日本NEC公司的一款面向企业的融合通信网关设备。 NEC UNIVERGE IX-R/IX-V Ver1.1至Ver1.3版本、Ver1.4.21至Ver1.4.28版本和Ver1.5.23版本存在授权问题漏洞，该漏洞源于WebGUI身份验证绕过问题，可能导致攻击者篡改WebGUI消息并通过互联网发送到设备，绕过身份验证并执行任意CLI命令。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
NEC Corporation UNIVERGE IX-R/IX-V All versions from Ver1.1 through Ver1.3, All versions from Ver1.4.21 through Ver1.4.28 and Ver1.5.23 -

II. Public POCs for CVE-2026-16876

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III. Intelligence Information for CVE-2026-16876

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Vendor Advisories for CVE-2026-16876 (1)

IV. Related Vulnerabilities

Same vendor: NEC Corporation
Same weakness: CWE-306

V. Comments for CVE-2026-16876

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