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

Source: https://junglewise.ai/threats/cve-2026-126759-a-flaw-has-been-found-in-h3c-icg2000-unified-communication  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-12. Updated: 2026-11-12  
License: CC BY 4.0 with a link back

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](https://junglewise.ai/threats/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

- [https://vuldb.com/cve/CVE-2026-126759](https://vuldb.com/cve/CVE-2026-126759)
- [https://vuldb.com/submit/1035822](https://vuldb.com/submit/1035822)