Quick answers
- Is CVE-2026-36822 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-36822 being exploited in the wild.
- How severe is CVE-2026-36822?
- Informational severity, published 9 June 2026.
- Which products and versions are affected?
- Tenda W20E v15.11.0.6.
- Is there a fix for CVE-2026-36822?
- 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-2026-36822 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-36822?
- Check whether you run Tenda W20E 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 W20E v15.11.0.6 firmware within the 'formDelStaState' function. The vulnerability is triggered when the 'macAddr' HTTP parameter, retrieved via 'websGetVar', is passed to 'init_wl_policy_list'. Inside this function, a 'memcpy' operation uses a source string derived from 'strtok' without adequate bounds checking, copying up to 0x20 bytes into a destination buffer that can be overrun if the input string (e.g., a long sequence of characters followed by a comma) exceeds expected lengths. A remote attacker can exploit this by sending a crafted HTTP request to the 'delStaState' action, resulting in a process crash or device instability (Denial of Service).
Affected products
- Tenda W20E v15.11.0.6
Timeline
- 2026-03-19: other: CVE request submitted to MITRE
- 2026-06-06: disclosed: Public disclosure
- 2026-06-09: advisory: NVD published date