PT-2026-21410 · Tenda · Tenda Hg9

Linxi666 · CVE-2026-2909 · Published 2026-02-10 · Updated 2026-02-27

Positive Technologies (AI Summary)

CVSS v2.0

9.0

High

Base vector

AV:N/AC:L/Au:S/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions Tenda HG9 version 300001138

Description A security flaw exists in the Tenda HG9 router's Diagnostic Ping component. The issue stems from a stack-based buffer overflow caused by improper handling of input in the pingAddr argument of the /boaform/formPing endpoint. This allows a remote attacker to potentially execute arbitrary code, cause a denial of service, or compromise the device. The exploit for this issue is publicly available.

Recommendations Versions prior to 300001139 are affected. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

DoS

Buffer Overflow

Stack Overflow

Weakness Enumeration

CWE-119

CWE-121

Related Identifiers

BDU:2026-07496

CVE-2026-2909

Affected Products

Tenda Hg9

References · 15

• 🔥 https://github.com/QIU-DIE/cve-nneeww/issues/11 · Exploit
• https://bdu.fstec.ru/vul/2026-07496 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-2909 · Security Note
• https://osv.dev/vulnerability/CVE-2026-2909 · Vendor Advisory
• https://twitter.com/CVEnew/status/2025425441226666391 · Twitter Post
• https://twitter.com/CveFindCom/status/2025400322558992789 · Twitter Post
• https://t.me/cveNotify/152752 · Telegram Post
• https://vuldb.com/?submit.755211 · Note
• https://vuldb.com/?id.347218 · Note
• https://twitter.com/cracbot/status/2027337992197820521 · Twitter Post
• https://twitter.com/CveTodo/status/2025398230989595098 · Twitter Post
• https://t.me/CVEtracker/45410 · Telegram Post
• https://vuldb.com/?ctiid.347218 · Note
• https://tenda.com.cn · Note
• https://twitter.com/CVEarity/status/2025574709715403189 · Twitter Post