CVE-2026-2140

HIGH
2026-02-08 [email protected]
8.8
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

3
Analysis Generated
Mar 12, 2026 - 21:55 vuln.today
PoC Detected
Feb 10, 2026 - 19:28 vuln.today
Public exploit code
CVE Published
Feb 08, 2026 - 07:16 nvd
HIGH 8.8

Tags

Buffer Overflow Tx9 Firmware

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.

Analysis

Remote code execution in Tenda TX9 firmware through version 22.03.02.10_multi allows authenticated attackers to achieve complete system compromise via a buffer overflow in the /goform/setMacFilterCfg endpoint. Public exploit code exists for this vulnerability, and no patch is currently available. …

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Remediation

Within 24 hours: Inventory all Tenda TX9 devices and isolate affected units from production networks if possible. Within 7 days: Contact Tenda for patched firmware availability and begin staged deployment testing in isolated lab environment. …

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Priority Score

64
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +44
POC: +20

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CVE-2026-2140 vulnerability details – vuln.today
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