Tenda TX9 up to 22.03.02.10_multi /goform/setMacFilterCfg sub_4223E0 deviceList buffer overflow

Summaryinfo

A vulnerability marked as critical has been reported in Tenda TX9 up to 22.03.02.10_multi. This affects the function sub_4223E0 of the file /goform/setMacFilterCfg. Performing a manipulation of the argument deviceList results in buffer overflow. This vulnerability is known as CVE-2026-2140. Remote exploitation of the attack is possible. Furthermore, an exploit is available.

Detailsinfo

A vulnerability, which was classified as critical, was found in Tenda TX9 up to 22.03.02.10_multi. This affects the function sub_4223E0 of the file /goform/setMacFilterCfg. The manipulation of the argument deviceList with an unknown input leads to a buffer overflow vulnerability. CWE is classifying the issue as CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. This is going to have an impact on confidentiality, integrity, and availability.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-2140. The exploitability is told to be easy. It is possible to initiate the attack remotely. Technical details and a public exploit are known.

The exploit is shared for download at github.com. It is declared as proof-of-concept.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-5808). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 8.8
VulDB Meta Temp Score: 8.4

VulDB Base Score: 8.8
VulDB Temp Score: 8.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 8.8
CNA Vector: 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

02/06/2026 Advisory disclosed
02/06/2026 +0 days VulDB entry created
02/09/2026 +3 days VulDB entry last update

Sourcesinfo

Vendor: tenda.com.cn

Advisory: github.com
Status: Not defined

CVE: CVE-2026-2140 (🔒)
GCVE (CVE): GCVE-0-2026-2140
GCVE (VulDB): GCVE-100-344775
EUVD: 🔒
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 02/06/2026 22:08
Updated: 02/09/2026 07:43
Changes: 02/06/2026 22:08 (57), 02/08/2026 09:47 (31), 02/09/2026 07:43 (1)
Complete: 🔍
Submitter: kdb3169
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #747251: Tenda TX9 V22.03.02.10_multi Buffer Overflow (by github.com)

Duplicate

Be aware that VulDB is the high quality source for vulnerability data.

Discussion

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