CVE-2024-4246Network attack vector

Authenticated device compromise via ssidIndex stack overflow

Published Apr 27, 2024 · Updated Aug 1, 2024

Stack-based buffer overflow in Tenda i21 1.0.0.14(4656) allows remote authenticated users to compromise the device via ssidIndex. The formQosManageDouble_auto function fails to constrain ssidIndex before its data overruns a stack buffer; public sources do not identify the copy operation or request endpoint. Network access to the web management interface and a low-privilege authenticated session are required; successful exploitation can alter device data or interrupt service.

CVSS severity8.8
High
EPSS probability1.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in Tenda i21 1.0.0.14(4656) allows remote authenticated users to compromise the device via ssidIndex. The formQosManageDouble_auto function fails to constrain ssidIndex before its data overruns a stack buffer; public sources do not identify the copy operation or request endpoint. Network access to the web management interface and a low-privilege authenticated session are required; successful exploitation can alter device data or interrupt service.

The record

CVE
CVE-2024-4246
Published
Apr 27, 2024
Updated
Aug 1, 2024
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
i21
Classifications
CWE-121, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 27, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 1, 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?

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

  1. Affected versionversion=1.0.0.14 (4656)
  2. Affected versionversion=1.0.0.14(4656)

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Shenzhen Tenda Technology Co., Ltd. · i21version=1.0.0.14 (4656); version=1.0.0.14(4656)

Published CVSS scores

9.0VulDBAV:N/AC:L/Au:S/C:C/I:C/A:C
8.8VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.8VulDBCVSS:3.0/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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