Vulnerability · Published Aug 14, 2026 · Assigned by VulDB

CVE-2026-19790Tenda G0 httpd Web Management module formSetPortMirror stack-based overflow

High 8.8

In plain English

A high-severity stack buffer overflow in G0 from Tenda. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 58% of all known vulnerabilities).

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)0.9%top 41.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A vulnerability was identified in Tenda G0 up to 20260625. This issue affects the function formSetPortMirror of the file /goform/module of the component httpd Web Management Interface. Such manipulation of the argument portMirrorMirroredPorts leads to stack-based buffer overflow. The attack can be executed remotely. The exploit is publicly available and might be used.

Affected products (as reported)

Vendor	Product	Versions
Tenda	G0	20260625

Weakness: CWE-121, CWE-119 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R

References

VDB-389757 | Tenda G0 httpd Web Management module formSetPortMirror stack-based overflow vdb-entry, technical-description
VDB-389757 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
CVE-2026-19790 | CVE Analysis and Report third-party-advisory
Submit #868924 | Tenda G0 Tenda G0 Buffer Overflow third-party-advisory
https://github.com/lipenghai/iot_bug/blob/main/Tenda/G0/1.md exploit
https://www.tenda.com.cn/ product