Vulnerability · Published Feb 8, 2026 · Assigned by VulDB
CVE-2026-2140Tenda TX9 setMacFilterCfg sub_4223E0 buffer overflow
High 8.8
In plain English
A high-severity buffer overflow in TX9 from Tenda. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 57% of all known vulnerabilities).
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.8%top 42.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
Weakness: CWE-120, CWE-119 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
References
- VDB-344775 | Tenda TX9 setMacFilterCfg sub_4223E0 buffer overflow vdb-entry, technical-description
- VDB-344775 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- Submit #747251 | Tenda TX9 V22.03.02.10_multi Buffer Overflow third-party-advisory
- Submit #749747 | Tenda TX9 V22.03.02.18 Stack-based Buffer Overflow (Duplicate) third-party-advisory
- https://github.com/MRAdera/IoT-Vuls/blob/main/tenda/tx9%20pro/setMacFilterCfg.md related
- https://github.com/MRAdera/IoT-Vuls/blob/main/tenda/tx9%20pro/setMacFilterCfg.md#poc exploit
- https://www.tenda.com.cn/ product