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Vulnerability record · CVE-2026-2140 · published 8 February 2026

CVE-2026-2140: Tenda tx9 firmware memory buffer overflow vulnerability

Tenda · Tx9 Firmware

A vulnerability was identified in Tenda TX9 up to 22.03.02.10_multi. Affected by this issue is the function sub_4223E0 of the file /goform/setMacFilterCfg. Such manipulation of the argument deviceList leads to buffer overflow. The attack may be launched remotely. The exploit is publicly available and might be used.

7.4 CVSS 4.0 High EPSS 0.76% · top 46.5% CWE-119 · Memory buffer overflowCWE-120 · Classic buffer overflow
7.4CVSS 4.0 base score, v2 9.0
0.76%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
7References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

A vulnerability was identified in Tenda TX9 up to 22.03.02.10_multi. Affected by this issue is the function sub_4223E0 of the file /goform/setMacFilterCfg. Such manipulation of the argument deviceList leads to buffer overflow. The attack may be launched remotely. The exploit is publicly available and might 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/MRAdera/IoT-Vuls/blob/main/tenda/tx9%20pro/setMacFilterCfg.md ExploitThird Party Advisory
https://github.com/MRAdera/IoT-Vuls/blob/main/tenda/tx9%20pro/setMacFilterCfg.md#poc Exploit
https://vuldb.com/?ctiid.344775 Permissions RequiredVDB Entry
https://vuldb.com/?id.344775 Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.747251 Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.749747 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-2026-2140), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.