Tenda HG3 formgponConf os command injection

published 2026-04-27 6 mo ago modified 2026-10-26 13 d ago also EUVD-2026-25786

cvss: 8.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 4.1%; EPSS 4.1% chance of exploitation in 30 days, percentile 90%
public exploits: 0; none known

A security flaw has been discovered in Tenda HG3 2.0 300003070. This vulnerability affects the function formgponConf of the file /boaform/admin/formgponConf. The manipulation of the argument fmgpon_loid results in os command injection. It is possible to launch the attack remotely. The exploit has been released to the public and may be used for attacks.

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: total
Assessed: 6 mo ago (2026-04-27)

Exploit prediction

4.08% chance of exploitation in the next 30 days, higher than 90% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

notion.so https://www.notion.so/Tenda-HG3-3250c75766a880c7b50fde0466557c5f referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	4.0	8.7	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
CNA	3.1	8.8	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
CNA	3.0	8.8	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
CNA	2.0	9.0	AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR
CNA	4.0	7.4	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CNA	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA	2.0	9.0	AV:N/AC:L/Au:S/C:C/I:C/A:C

Affected products

Tenda HG3

Classification

Weakness

CWE-78 Improper Neutralization of Special Elements used in an OS Command
CWE-77 Improper Neutralization of Special Elements used in a Command

References

notion.so /Tenda-HG3-3250c75766a880c7b50fde0466557c5f
exploit, third-party-advisory
vuldb.com /vuln/359671
vdb-entry, technical-description, third-party-advisory
vuldb.com /vuln/359671/cti
signature, permissions-required, vdb-entry
vuldb.com /submit/800796
third-party-advisory, vdb-entry
tenda.com.cn /
product

Sources

CVE List CVE-2026-7096
NVD CVE-2026-7096

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary