Vulnerability · Published Feb 22, 2026 · Assigned by VulDB

CVE-2026-2907Tenda HG9 GPON Configuration Endpoint formgponConf 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 weakness has been identified in Tenda HG9 300001138. Affected by this vulnerability is an unknown functionality of the file /boaform/formgponConf of the component GPON Configuration Endpoint. This manipulation of the argument fmgpon_loid/fmgpon_loid_password causes stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been made available to the public and could be used for attacks.

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-347216 | Tenda HG9 GPON Configuration Endpoint formgponConf stack-based overflow vdb-entry, technical-description
VDB-347216 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
Submit #755201 | Tenda HG9 V300001138 Stack-based Buffer Overflow third-party-advisory
https://github.com/QIU-DIE/cve-nneeww/issues/9 exploit, issue-tracking
https://www.tenda.com.cn/ product