Quick answers
- Is CVE-2026-36805 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-36805 being exploited in the wild.
- How severe is CVE-2026-36805?
- Informational severity, with a CVSS score of 7.5, published 9 June 2026.
- Which products and versions are affected?
- Tenda G0 v15.11.0.5; Tenda PW201A V1.0.5.
- Is there a fix for CVE-2026-36805?
- 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-2026-36805 attacked?
- It is attacked over the network, in device firmware.
- Am I affected by CVE-2026-36805?
- Check whether you run Tenda G0 or Tenda PW201A 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_HTTPD' binary of Tenda G0 and PW201A devices. The vulnerability is located within the Saveqqlist function (called by the L7Im handler at offset 0x42d520), where user-supplied input from the 'qqStr' and 'markStr' HTTP parameters is processed using 'sprintf' without adequate bounds checking. An unauthenticated remote attacker can exploit this by sending a crafted HTTP request containing excessively long strings in these parameters. Successful exploitation leads to a process crash or device instability, resulting in a Denial of Service (DoS).
Affected products
- Tenda G0 v15.11.0.5
- Tenda PW201A V1.0.5
Timeline
- 2026-03-17: other: CVE request submitted to MITRE
- 2026-06-06: disclosed: Public disclosure of vulnerability details
- 2026-06-09: advisory: NVD published CVE-2026-36805