Quick answers
- Is CVE-2026-51934 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-51934 being exploited in the wild.
- How severe is CVE-2026-51934?
- Critical severity, with a CVSS score of 9.8, published 1 September 2026.
- Which products and versions are affected?
- Tenda A18 15.13.07.09.
- Is there a fix for CVE-2026-51934?
- 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-2026-51934 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-51934?
- Check whether you run Tenda A18 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
This vulnerability is a buffer overflow in the fromSetCmdlineRun function within Tenda A18 firmware version 15.13.07.09. The vulnerability can be triggered remotely without authentication, allowing an attacker to overflow a buffer and execute arbitrary code with device privileges. The attack vector is network-based, requiring no user interaction or authentication. Successful exploitation grants the attacker complete control over the router, enabling network interception, device compromise, and lateral movement into connected networks.
Affected products
- Tenda A18 15.13.07.09
Timeline
- 2026-09-01: disclosed