Vulnerability record · CVE-2026-2139 · published 8 February 2026

CVE-2026-2139: Tenda tx9 firmware memory buffer overflow vulnerability

Tenda · Tx9 Firmware

A vulnerability was determined in Tenda TX9 up to 22.03.02.10_multi. Affected by this vulnerability is the function sub_432580 of the file /goform/fast_setting_wifi_set. This manipulation of the argument ssid causes buffer overflow. The attack may be initiated remotely. The exploit has been publicly disclosed and may be utilized.

7.4 CVSS 4.0 High EPSS 0.65% · top 51.1% CWE-119 · Memory buffer overflowCWE-120 · Classic buffer overflow

7.4CVSS 4.0 base score, v2 9.0

0.65%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

6References, 2 tagged exploit

17 Jun 2026Last modified by NVD

Description

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.

Tx9 Firmware Tenda

References

Link	Tags
https://github.com/MRAdera/IoT-Vuls/blob/main/tenda/tx9%20pro/fast_setting_wifi_set.md	ExploitThird Party Advisory
https://github.com/MRAdera/IoT-Vuls/blob/main/tenda/tx9%20pro/fast_setting_wifi_set.md#poc	Exploit
https://vuldb.com/?ctiid.344774	Permissions RequiredVDB Entry
https://vuldb.com/?id.344774	Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.747250	Third Party AdvisoryVDB Entry
https://www.tenda.com.cn/	Product

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

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Source: NIST National Vulnerability Database (record CVE-2026-2139), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.