Quick answers
- Is CVE-2026-18811 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-18811 being exploited in the wild.
- How severe is CVE-2026-18811?
- 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-2026-18811?
- 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-2026-18811 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-18811?
- 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 Add function of the /api/esps endpoint in H3C NX15 V100R017. The vulnerability arises from insufficient input validation on the esps.filter.url argument, which is passed unsafely to a system command. The attack is remotely exploitable without authentication requirements and allows an attacker to execute arbitrary commands with the privileges of the application. Public exploit code is now available. A patch or mitigation from the vendor should be monitored.
Affected products
- H3C NX15 V100R017
Timeline
- 2026-08-04: disclosed