Quick answers
- Is CVE-2026-36807 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-36807 being exploited in the wild.
- How severe is CVE-2026-36807?
- Informational severity, with a CVSS score of 7.5, published 9 June 2026.
- Which products and versions are affected?
- Tenda W15E v15.11.0.10.
- Is there a fix for CVE-2026-36807?
- 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-2026-36807 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-36807?
- Check whether you run Tenda W15E 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 stack-based buffer overflow exists in the Tenda W15E v15.11.0.10 firmware within the 'formAddWebAuthUser' function. The vulnerability is triggered when the 'webAuthUserInfo' (or 'webAuthUserPwd' as referenced in some descriptions) parameter is processed. Specifically, the code uses 'websGetVar' to retrieve user input and then performs a 'strncpy' operation into a fixed-size 'temp' buffer without adequate bounds checking, using a length calculated by 'strchr' finding a newline character. An attacker can exploit this by sending a crafted HTTP request to the 'addWebAuthUser' action with a long string followed by a newline, leading to a process crash and Denial of Service (DoS).
Affected products
- Tenda W15E v15.11.0.10
Timeline
- 2026-03-18: other: CVE request submitted to MITRE
- 2026-06-06: disclosed: Public disclosure via GitHub repository
- 2026-06-09: advisory: NVD published CVE-2026-36807