High severity · published Feb 8, 2026
CVE-2026-2140
Tenda TX9 setMacFilterCfg sub_4223E0 buffer overflow
8.8
CVSS
0.8%
EPSS
No
On KEV
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 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)0.8% · higher than 57% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
TX
TX9 · Tenda
22.03.02.10_multi · source: vendor
TF
Tx9 Firmware · Tenda
through 22.03.02.10 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-2140
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-2140
Exploit
https://github.com/MRAdera/IoT-Vuls/blob/main/tenda/tx9%20pro/setMacFilterCfg.md
Exploit
https://github.com/MRAdera/IoT-Vuls/blob/main/tenda/tx9%20pro/setMacFilterCfg.md#poc
Permissions Required
https://vuldb.com/?ctiid.344775
Third Party Advisory
https://vuldb.com/?id.344775
Third Party Advisory
https://vuldb.com/?submit.747251
Third Party Advisory
https://vuldb.com/?submit.749747
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