Vulnerability-Lookup

JVNDB-2026-000119

Vulnerability from jvndb - Published: 2026-08-21 06:39 - Updated:2026-08-21 06:39

Severity

9.4 (Critical) - cvssV3_0 - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L

Summary

UNIVERGE IX-R/IX-V series routers vulnerable to missing authentication for critical function

Details

UNIVERGE IX-R/IX-V series routers provided by NEC Corporation contain the following vulnerability.

Missing authentication for critical function (CWE-306) - CVE-2026-16876

Kojiro Enokida of SOPHOS reported this vulnerability to IPA. JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.

References

Type

URL

	JVN	https://jvn.jp/en/jp/JVN81414813/index.html
	CVE	https://www.cve.org/CVERecord?id=CVE-2026-16876
	No Mapping(CWE-Other)	https://www.ipa.go.jp/en/security/vulnerabilities/cwe.html

Impacted products

Vendor

Product

NEC Corporation

UNIVERGE

Show details on JVN DB website

JSON

To clipboard

{
  "@rdf:about": "https://jvndb.jvn.jp/en/contents/2026/JVNDB-2026-000119.html",
  "dc:date": "2026-08-21T15:39+09:00",
  "dcterms:issued": "2026-08-21T15:39+09:00",
  "dcterms:modified": "2026-08-21T15:39+09:00",
  "description": "UNIVERGE IX-R/IX-V series routers provided by NEC Corporation contain the following vulnerability.\u003ca href=\u0027https://cwe.mitre.org/data/definitions/306.html\u0027 target=\u0027_blank\u0027\u003e\u003c/a\u003e\u003ca href=\u0027https://www.cve.org/CVERecord?id=CVE-2026-16876\u0027 target=\u0027_blank\u0027\u003e\u003c/a\u003e\u003cul\u003e\u003cli\u003eMissing authentication for critical function (CWE-306) - CVE-2026-16876\u003c/li\u003e\u003c/ul\u003eKojiro Enokida of SOPHOS reported this vulnerability to IPA.\r\nJPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.",
  "link": "https://jvndb.jvn.jp/en/contents/2026/JVNDB-2026-000119.html",
  "sec:cpe": {
    "#text": "cpe:/o:nec:univerge",
    "@product": "UNIVERGE",
    "@vendor": "NEC Corporation",
    "@version": "2.2"
  },
  "sec:cvss": {
    "@score": "9.4",
    "@severity": "Critical",
    "@type": "Base",
    "@vector": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L",
    "@version": "3.0"
  },
  "sec:identifier": "JVNDB-2026-000119",
  "sec:references": [
    {
      "#text": "https://jvn.jp/en/jp/JVN81414813/index.html",
      "@id": "JVN#81414813",
      "@source": "JVN"
    },
    {
      "#text": "https://www.cve.org/CVERecord?id=CVE-2026-16876",
      "@id": "CVE-2026-16876",
      "@source": "CVE"
    },
    {
      "#text": "https://www.ipa.go.jp/en/security/vulnerabilities/cwe.html",
      "@id": "CWE-Other",
      "@title": "No Mapping(CWE-Other)"
    }
  ],
  "title": "UNIVERGE IX-R/IX-V series routers vulnerable to missing authentication for critical function"
}

CVE-2026-16876 (GCVE-0-2026-16876)

Vulnerability from cvelistv5 – Published: 2026-09-07 00:48 – Updated: 2026-09-08 15:32

Summary

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.

Severity

9.3 (Critical)


                        
                          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

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-08 15:32 UTC

CWE

CWE-306 - Missing Authentication for Critical Function

Assigner

NEC jpcert root

References

1 reference

URL	Tags
https://jpn.nec.com/security-info/secinfo/nv26-00…

Impacted products

1 product

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

Credits

Kojiro Enokida of Sophos Ltd.

Show details on NVD website

JSON

To clipboard

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                "id": "CVE-2026-16876",
                "options": [
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                  {
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                  },
                  {
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                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-08T15:32:24.111712Z",
                "version": "2.0.3"
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    "dateReserved": "2026-07-24T04:35:25.244Z",
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    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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Confirmed: The vulnerability has been validated from an analyst's perspective.
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Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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JVNDB-2026-000119

CVE-2026-16876 (GCVE-0-2026-16876)

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