Quick answers
- Is CVE-2026-5605 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-5605 being exploited in the wild.
- How severe is CVE-2026-5605?
- High severity, with a CVSS score of 8.8, published 6 April 2026.
- Which products and versions are affected?
- Tenda CH22 1.0.0.1.
- Is there a fix for CVE-2026-5605?
- 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-2026-5605 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-5605?
- Check whether you run Tenda CH22 or Tenda Ch22 Firmware 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 httpd service of Tenda CH22 firmware version 1.0.0.1. The flaw is located within the formWrlExtraSet function in the /goform/WrlExtraSet component. The vulnerability is triggered when the 'GO' parameter is processed by the sub_396FC function; specifically, a lack of length validation allows a long string to overflow a stack buffer via a sprintf call. A remote attacker with low privileges can exploit this by sending a specially crafted POST request. Successful exploitation can lead to a Denial of Service (DoS) or Remote Code Execution (RCE). A public Proof of Concept (PoC) is available.
Affected products
- Tenda CH22 1.0.0.1
Timeline
- 2026-04-05: disclosed: Vulnerability reported to VulDB
- 2026-04-06: advisory: NVD advisory published