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PatchSiren cyber security CVE debrief

CVE-2026-36784 Shenzhen Tenda Technology Co., Ltd CVE debrief

A stack overflow vulnerability was discovered in Shenzhen Tenda Technology Co., Ltd Tenda O3 Wireless Router v1.0.0.5(4180). The vulnerability exists in the ip parameter of the fromNetToolGet function, which allows attackers to cause a Denial of Service (DoS) via a HTTP request. The vulnerability has a CVSS score of 7.5 and is classified as HIGH severity.

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

Users of Shenzhen Tenda Technology Co., Ltd Tenda O3 Wireless Router v1.0.0.5(4180) should be aware of this vulnerability and take necessary actions to mitigate the risk.

Technical summary

The vulnerability is caused by a stack overflow in the ip parameter of the fromNetToolGet function. This allows attackers to cause a Denial of Service (DoS) via a HTTP request.

Defensive priority

HIGH

Recommended defensive actions

  • Update to a patched version of the Tenda O3 Wireless Router if available.
  • Limit access to the router's management interface to trusted IP addresses.
  • Monitor router logs 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-2026-36784).

Sources and references

Verified primary and authoritative sources

  • CVE-2026-36784 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-36784

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-36784 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-36784

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.