High severity · published Feb 22, 2026
CVE-2026-2909
Tenda HG9 Diagnostic Ping Endpoint formPing stack-based overflow
8.8
CVSS
0.6%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 51% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HG
HG9 · Tenda
300001138 · source: vendor
HF
Hg9 Firmware · Tenda
300001138 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-2909
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-2909
Exploit
https://github.com/QIU-DIE/cve-nneeww/issues/11
Permissions Required
https://vuldb.com/?ctiid.347218
Third Party Advisory
https://vuldb.com/?id.347218
Third Party Advisory
https://vuldb.com/?submit.755211
Product
https://www.tenda.com.cn/
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