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Vulnerability record · CVE-2026-2909 · published 22 February 2026

CVE-2026-2909: Tenda hg9 firmware memory buffer overflow vulnerability

Tenda · Hg9 Firmware

A vulnerability was detected in Tenda HG9 300001138. This affects an unknown part of the file /boaform/formPing of the component Diagnostic Ping Endpoint. Performing a manipulation of the argument pingAddr results in stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit is now public and may be used.

7.4 CVSS 4.0 High EPSS 1.0% · top 37.9% CWE-119 · Memory buffer overflowCWE-121 · Stack-based buffer overflow
7.4CVSS 4.0 base score, v2 9.0
1.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
5References, 1 tagged exploit
17 Jun 2026Last modified by NVD

Description

A vulnerability was detected in Tenda HG9 300001138. This affects an unknown part of the file /boaform/formPing of the component Diagnostic Ping Endpoint. Performing a manipulation of the argument pingAddr results in stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit is now public and may be used.

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:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/QIU-DIE/cve-nneeww/issues/11 ExploitIssue TrackingMitigationThird Party Advisory
https://vuldb.com/?ctiid.347218 Permissions RequiredVDB Entry
https://vuldb.com/?id.347218 Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.755211 Third Party AdvisoryVDB Entry
https://www.tenda.com.cn/ Product

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.8CVE-2022-30023Tenda hg9 firmware os command injection vulnerabilityTenda ONT GPON AC1200 Dual band WiFi HG9 v1.0.1 is vulnerable to Command Injection via the Ping function.EPSS 39%7.4CVE-2026-2910Tenda hg9 firmware memory buffer overflow vulnerabilityA flaw has been found in Tenda HG9 300001138. This vulnerability affects unknown code of the file /boaform/formPing6. Executing a manipulation of the…EPSS 1.0%7.4CVE-2026-2906Tenda hg9 firmware memory buffer overflow vulnerabilityA security flaw has been discovered in Tenda HG9 300001138. Affected is an unknown function of the file /boaform/formSamba of the component Samba Con…EPSS 1.0%7.4CVE-2026-2907Tenda hg9 firmware memory buffer overflow vulnerabilityA weakness has been identified in Tenda HG9 300001138. Affected by this vulnerability is an unknown functionality of the file /boaform/formgponConf o…EPSS 1.0%7.4CVE-2026-2908Tenda hg9 firmware memory buffer overflow vulnerabilityA security vulnerability has been detected in Tenda HG9 300001138. Affected by this issue is some unknown functionality of the file /boaform/formLoop…EPSS 1.0%7.4CVE-2026-2905Tenda hg9 firmware memory buffer overflow vulnerabilityA vulnerability was identified in Tenda HG9 300001138. This impacts an unknown function of the file /boaform/formWlanSetup of the component Wireless …EPSS 1.0%9.5CVE-2026-88772Citrix NetScaler Improper Restriction of Operations within the Bounds of a Memory Buffer VulnerabilityVulnerability in Citrix NetScaler ADC and Citrix NetScaler Gateway. This issue affects ADC: before 14.1-73.37, before 13.1-64.23, before 14.1-73.37 F…KEV8.8CVE-2026-8452Citrix NetScaler ADC and Gateway memory buffer overflow causes DoSCVE-2026-8452 is a memory buffer overflow (CWE-119) in Citrix NetScaler ADC and NetScaler Gateway that leads to unpredictable or erroneous behavior a…KEVEPSS 1.0%analysed

Source: NIST National Vulnerability Database (record CVE-2026-2909), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.