Vulnerability · Published Feb 22, 2026 · Assigned by VulDB

CVE-2026-2908Tenda HG9 Loopback Detection Configuration Endpoint formLoopBack stack-based overflow

High 8.8

In plain English

A high-severity stack buffer overflow in HG9 from Tenda. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 51% of all known vulnerabilities).

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)0.6%top 48.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A security vulnerability has been detected in Tenda HG9 300001138. Affected by this issue is some unknown functionality of the file /boaform/formLoopBack of the component Loopback Detection Configuration Endpoint. Such manipulation of the argument Ethtype leads to stack-based buffer overflow. The attack can be executed remotely. The exploit has been disclosed publicly and may be used.

Affected products (as reported)

Vendor	Product	Versions
Tenda	HG9	300001138

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-347217 | Tenda HG9 Loopback Detection Configuration Endpoint formLoopBack stack-based overflow vdb-entry, technical-description
VDB-347217 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
Submit #755202 | Tenda HG9 V300001138 Stack-based Buffer Overflow third-party-advisory
https://github.com/QIU-DIE/cve-nneeww/issues/10 exploit, issue-tracking
https://www.tenda.com.cn/ product