CVE-2026-2140Public exploitNetwork attack vector

Authenticated code execution via unchecked deviceList copy

Published Feb 8, 2026 · Updated Feb 8, 2026

Stack-based buffer overflow in Tenda TX9 22.03.02.10_multi allows remote authenticated users to crash the router or execute code. The setMacFilterCfg handler passes the user-controlled deviceList value through sub_4223E0 to strcpy without checking its length, overflowing stack buffer v15. Low-privilege access to the management endpoint is required; successful exploitation can interrupt routing or compromise the appliance.

CVSS severity8.8
High
EPSS probability0.76%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Stack-based buffer overflow in Tenda TX9 22.03.02.10_multi allows remote authenticated users to crash the router or execute code. The setMacFilterCfg handler passes the user-controlled deviceList value through sub_4223E0 to strcpy without checking its length, overflowing stack buffer v15. Low-privilege access to the management endpoint is required; successful exploitation can interrupt routing or compromise the appliance.

The record

CVE
CVE-2026-2140
Published
Feb 8, 2026
Updated
Feb 8, 2026
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
TX9
Classifications
CWE-119, CWE-120, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=22.03.02.10_multi

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Shenzhen Tenda Technology Co., Ltd. · TX9version=22.03.02.10_multi

Published CVSS scores

8.7TenableCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
9.0VulDBAV:N/AC:L/Au:S/C:C/I:C/A:C
7.4VulDBCVSS: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
8.8VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo