CVE-2024-40412Public exploit

Router crash via unchecked deviceList copy

Published Jul 10, 2024 · Updated Aug 2, 2024

A stack-based buffer overflow in Tenda AX12 1.0 firmware 22.03.01.46 allows remote authenticated users to crash the router. The /goform/setMacFilterCfg handler passes the deviceList parameter to strcpy in sub_42E410 without checking its length. A valid management-session cookie and adjacent-network access are required; an oversized value overflows the stack and interrupts routing service.

CVSS severity6.8
Medium
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A stack-based buffer overflow in Tenda AX12 1.0 firmware 22.03.01.46 allows remote authenticated users to crash the router. The /goform/setMacFilterCfg handler passes the deviceList parameter to strcpy in sub_42E410 without checking its length. A valid management-session cookie and adjacent-network access are required; an oversized value overflows the stack and interrupts routing service.

The record

CVE
CVE-2024-40412
Published
Jul 10, 2024
Updated
Aug 2, 2024
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
AX12
Classifications
CWE-121, T1499
Attack vector
adjacent
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 10, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=1.0

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesauthenticated

What is affected?

Shenzhen Tenda Technology Co., Ltd. · AX12version=1.0
Shenzhen Tenda Technology Co., Ltd. · AX12 Firmwareversion=22.03.01.46

Published CVSS scores

6.8CISA-ADPCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
T1499Endpoint Denial of Service

Public exploit references

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Technologies

Your stack

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Your stack

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