# CVE-2026-126759: H3C ICG2000 Unified Communication Gateway Web Management check.j missing authentication

Status: published. Published: 2026-11-11. Updated: 2026-11-11.

A flaw has been found in H3C ICG2000 Unified Communication Gateway 2023. This issue affects some unknown processing of the file /wnm/check.j of the component Web Management Module. Executing a manipulation can lead to missing authentication. The attack may be performed from remote. The exploit has been published and may be used. The researcher claims that the vendor has acknowledged receipt of the vulnerability report. No further response has been received.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- H3C / ICG2000 Unified Communication Gateway: 2023 (affected). Source: CNA: VulDB

## Severity and prioritization

- CVSS 4.0: 6.9 (medium); CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P; source: CNA: VulDB

- CVSS 3.1: 5.3 (medium); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R; source: CNA: VulDB

- CVSS 3.0: 5.3 (medium); CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R; source: CNA: VulDB

- CVSS 2.0: 5 (medium); AV:N/AC:L/Au:N/C:P/I:N/A:N/E:POC/RL:ND/RC:UR; source: CNA: VulDB

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-306, CWE-287

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://vuldb.com/vuln/435869 (CNA: VulDB; vdb-entry)

- https://vuldb.com/vuln/435869/cti (CNA: VulDB; signature, permissions-required)

- https://vuldb.com/cve/CVE-2026-126759 (CNA: VulDB; third-party-advisory)

- https://vuldb.com/submit/1035822 (CNA: VulDB; third-party-advisory)

## Provenance

- CNA: VulDB: https://www.cve.org/CVERecord?id=CVE-2026-126759; retrieved 2026-11-12; source updated 2026-11-11

Revision: ab3c74da79ac704b14c2b15dc747aaacdfe5f9e6d6702c3aa01f4b3920c0c676

Canonical: https://y2.dev/cve/CVE-2026-126759

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