Quick answers
- Is CVE-2026-36803 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-36803 being exploited in the wild.
- How severe is CVE-2026-36803?
- Informational severity, with a CVSS score of 7.5, published 9 June 2026.
- Which products and versions are affected?
- Tenda PW201A v1.0.5.
- Is there a fix for CVE-2026-36803?
- 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-2026-36803 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-36803?
- Check whether you run 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 PW201A v1.0.5. The vulnerability is located in the qossetting function (offset 0x42e1c4), which is registered as a web form handler. The function retrieves the 'page' parameter using websGetVar and subsequently passes it to sprintf without length validation to populate a fixed-size stack buffer (acStack_120). An unauthenticated remote attacker can trigger this overflow by sending a crafted HTTP request with an excessively long string in the 'page' parameter, resulting in a process crash or device instability.
Affected products
- 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 date