PatchSiren cyber security CVE debrief

CVE-2026-36783 Shenzhen Tenda Technology Co., Ltd CVE debrief

CVE-2026-36783 is a HIGH severity vulnerability in Tenda O3 Wireless Router v1.0.0.5(4180). The vulnerability is caused by a stack overflow in the domain parameter of the fromNetToolGet function. This allows attackers to cause a Denial of Service (DoS) via a crafted HTTP request. The vulnerability has a CVSS score of 7.5 and was published on [cve-org](https://www.cve.org/CVERecord?id=CVE-2026-36783).

Vendor: Shenzhen Tenda Technology Co., Ltd
Product: Tenda O3 Wireless Router
CVSS: HIGH 7.5
CISA KEV: Not listed in stored evidence
Original CVE published: 2026-06-09
Original CVE updated: 2026-06-10
Advisory published: 2026-06-09
Advisory updated: 2026-06-10

Who should care

Administrators and users of Tenda O3 Wireless Router v1.0.0.5(4180) should be aware of this vulnerability and take necessary actions to mitigate it.

Technical summary

The vulnerability is caused by a stack overflow in the domain parameter of the fromNetToolGet function in Tenda O3 Wireless Router v1.0.0.5(4180). This allows attackers to cause a Denial of Service (DoS) via a crafted HTTP request.

Defensive priority

HIGH

Recommended defensive actions

Update to the latest firmware version if available.
Limit access to the router's management interface.
Monitor network traffic for suspicious activity.

Evidence notes

The vulnerability was discovered and reported by an unknown source. The CVE record was published on [cve-org](https://www.cve.org/CVERecord?id=CVE-2026-36783) and additional details can be found on [nvd](https://nvd.nist.gov/vuln/detail/CVE-2026-36783).

Official resources

CVE-2026-36783 was published on 2026-06-09T19:17:44.323Z and modified on 2026-06-10T20:16:39.320Z.