# CVE-2026-18812: H3C NX15 command injection in esps.ipv6.wan

Source: https://junglewise.ai/threats/cve-2026-18812-h3c-nx15-command-injection-in-esps-ipv6-wan  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-04. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-18812 · Severity: high · CVSS 7.2 · Published 2026-08-04

H3C NX15 is a networking appliance that manages IPv6 network settings. A vulnerability in the IPv6 WAN configuration function allows remote attackers to inject arbitrary commands by manipulating the workMode parameter, potentially achieving complete control over the device.

Technologies: [H3C NX15](https://junglewise.ai/threats/technologies/nx15). Vendors: [H3C](https://junglewise.ai/threats/vendors/h3c).

## Quick answers

**Is CVE-2026-18812 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-18812 being exploited in the wild.

**How severe is CVE-2026-18812?** High severity, with a CVSS score of 7.2, published 4 August 2026.

**Which products and versions are affected?** H3C NX15 V100R017.

**Is there a fix for CVE-2026-18812?** 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-2026-18812 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-18812?** Check whether you run H3C NX15 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 a command injection flaw in the esps.ipv6.wan function of the /api/esps endpoint in H3C NX15 V100R017. The vulnerability exists because user-supplied input in the workMode parameter is not properly sanitized before being passed to a system command execution context. An attacker can reach this endpoint remotely without authentication and inject arbitrary OS commands by crafting a malicious workMode value, leading to remote code execution with system privileges. Patches or vendor mitigations have been disclosed to the vendor.

## Affected products

- H3C NX15 V100R017

## Timeline

- 2026-08-04: disclosed: Exploit published and public

## References

- [https://github.com/coconut652-7/IOT_Vul_Public/tree/main/H3C/NX15R017/esps_ipv6_wan_set_workmode_root_rce](https://github.com/coconut652-7/IOT_Vul_Public/tree/main/H3C/NX15R017/esps_ipv6_wan_set_workmode_root_rce)
- [https://vuldb.com/cve/CVE-2026-18812](https://vuldb.com/cve/CVE-2026-18812)

## Related threats

- [H3C NX15 command injection in WAN repeater configuration](https://junglewise.ai/threats/cve-2026-18902-h3c-nx15-command-injection-in-wan-repeater-configuration)
- [H3C NX15 dangerous routine exposure in Web API](https://junglewise.ai/threats/cve-2026-18901-h3c-nx15-dangerous-routine-exposure-in-web-api)
- [H3C NX15 OS command injection in Backend RPC](https://junglewise.ai/threats/cve-2026-18900-h3c-nx15-os-command-injection-in-backend-rpc)
- [H3C NX15 command injection in reload.reload_config](https://junglewise.ai/threats/cve-2026-18814-h3c-nx15-command-injection-in-reload-reload-config)
- [H3C NX15 command injection in /api/esps delete](https://junglewise.ai/threats/cve-2026-18813-h3c-nx15-command-injection-in-api-esps-delete)