Quick answers
- Is CVE-2026-36793 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-36793 being exploited in the wild.
- How severe is CVE-2026-36793?
- Informational severity, published 9 June 2026.
- Which products and versions are affected?
- Tenda W3 Wireless Router v1.0.0.3(2204).
- Is there a fix for CVE-2026-36793?
- 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-2026-36793 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-36793?
- Check whether you run Tenda W3 Wireless Router 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 vulnerability exists in the Tenda W3 router's CGI handler function FUN_00442b44 (formwrlSSIDset). The vulnerability is triggered when the application processes user-supplied HTTP parameters 'mit_ssid' and 'mis_ssid_index' via websGetVar. These values are subsequently passed to an unsafe sprintf call without proper bounds checking, leading to a buffer overflow on the stack. An unauthenticated remote attacker can exploit this by sending a crafted HTTP request with excessively long strings in these parameters. Successful exploitation results in a crash of the httpd service or a full device reboot, causing a Denial of Service.
Affected products
- Tenda W3 Wireless Router v1.0.0.3(2204)
Timeline
- 2026-03-15: other: CVE request submitted to MITRE
- 2026-06-06: disclosed: Public disclosure
- 2026-06-09: advisory: NVD published date