Quick answers
- Is CVE-2026-38142 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-38142 being exploited in the wild.
- How severe is CVE-2026-38142?
- Medium severity, with a CVSS score of 6.5, published 1 July 2026.
- Which products and versions are affected?
- Tenda AC18 v15.03.05.05.
- Is there a fix for CVE-2026-38142?
- 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-2026-38142 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-38142?
- Check whether you run Tenda AC18 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
A command injection vulnerability (CWE-77) exists in the Tenda AC18 router running firmware version v15.03.05.05. The flaw is located within the '/goform/fast_setting_internet_set' endpoint, which fails to properly sanitize the 'mac' input parameter. An unauthenticated remote attacker can exploit this by sending a malicious HTTP request containing shell metacharacters in the MAC address field. Successful exploitation allows for arbitrary OS command execution on the underlying system. The vulnerability is described as second-order in some documentation, suggesting the injected payload may be stored and executed during a subsequent process.
Affected products
- Tenda AC18 v15.03.05.05
Timeline
- 2026-07-01: advisory: CVE-2026-38142 published by NVD