Is CVE-2026-126759 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-126759 being exploited in the wild.

How severe is CVE-2026-126759?

Medium severity, with a CVSS score of 5.3, published 12 November 2026.

Which products and versions are affected?

H3C ICG2000 Unified Communication Gateway 2023.

Is there a fix for CVE-2026-126759?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-126759 attacked?

It is attacked over the network.

Am I affected by CVE-2026-126759?

Check whether you run H3C ICG2000 Unified Communication Gateway at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-126759: H3C ICG2000 authentication bypass in Web Management Module

CVE-2026-126759 · Severity: medium · CVSS 5.3 · Published 2026-11-12

The H3C ICG2000 Unified Communication Gateway is a device that manages enterprise communications and networking. An authentication bypass vulnerability in its web management interface allows an unauthenticated remote attacker to manipulate the /wnm/check.j file, potentially gaining unauthorized access to the gateway's management functions. The vendor has acknowledged the report but no patch has been released.

Vendors: H3C.

Quick answers

Is CVE-2026-126759 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-126759 being exploited in the wild.
How severe is CVE-2026-126759?: Medium severity, with a CVSS score of 5.3, published 12 November 2026.
Which products and versions are affected?: H3C ICG2000 Unified Communication Gateway 2023.
Is there a fix for CVE-2026-126759?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-126759 attacked?: It is attacked over the network.
Am I affected by CVE-2026-126759?: Check whether you run H3C ICG2000 Unified Communication Gateway at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The vulnerability is an authentication bypass in the Web Management Module affecting file processing at /wnm/check.j. It is exploitable remotely without authentication, allowing an attacker to bypass access controls via direct manipulation. The CVSS score is 5.3 medium severity; exploit code has been published.

Affected products

H3C ICG2000 Unified Communication Gateway 2023

Timeline

2026-11-12: disclosed
exploited: Exploit code has been published

References

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