Cyber Resilience

CVE-2024-4248

High

Published: 27 April 2024

Published
27 April 2024
Modified
27 January 2025
KEV Added
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Patch
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CVSS Score v3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0015 34.9th percentile
Risk Priority 18 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2024-4248 is a high-severity Stack-based Buffer Overflow (CWE-121) vulnerability in Tenda I21 Firmware. Its CVSS base score is 8.8 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 34.9th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

A vulnerability was found in Tenda i21 1.0.0.14(4656) and classified as critical. This issue affects the function formQosManage_user. The manipulation of the argument ssidIndex leads to stack-based buffer overflow. The attack may be initiated remotely. The associated identifier of this…

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vulnerability is VDB-262139. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.

CWE(s)
CWE-121CWE-787

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1210 Exploitation of Remote Services Lateral Movement
Adversaries may exploit remote services to gain unauthorized access to internal systems once inside of a network.
attack.mitre.org →
T1499.004 Application or System Exploitation Impact
Adversaries may exploit software vulnerabilities that can cause an application or system to crash and deny availability to users.
attack.mitre.org →
Why these techniques?

Remote stack-based buffer overflow in the router's web QoS management function (formQosManage_user) enables exploitation of a public-facing web application (T1190), exploitation of remote services for code execution (T1210), and endpoint denial of service via application crash (T1499.004).

Affected Assets

tenda
i21 firmware
1.0.0.14\(4656\)

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SI-16 Memory Protection
addresses: CWE-787

Out-of-bounds writes that corrupt control flow or inject shellcode are rendered non-executable by the same memory protections.

References