Cyber Resilience

CVE-2024-50667

Memory Safety in Trendnet Tew-820Ap Firmware 1.01.b01

Public PoCMemory Safety
Published
11 November 2024
Modified
01 April 2025
Patch / advisory
View advisory
CVSS Score v3.1 9.8
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.065 93th percentile
Risk Priority 84 floored blend · peak EPSS

Summary

CVE-2024-50667 is a critical-severity Classic Buffer Overflow (CWE-120) vulnerability in Trendnet Tew-820Ap Firmware. Its CVSS base score is 9.8 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked in the top 7% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

The strongest mitigations our analysis identified map to SA-11 (Developer Testing and Evaluation) and SI-10 (Information Input Validation) — see the control section below for these in your framework.

Deeper analysis AI-assisted summary

Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.

CVE-2024-50667 is a stack-based buffer overflow in the boa httpd web server component of the Trendnet TEW-820AP wireless access point running firmware 1.01.B01. The flaw exists in the IPv6 address handling routines exposed at the endpoints /boafrm/formIPv6Addr, /boafrm/formIpv6Setup, and /boafrm/formDnsv6; insufficient validation of supplied IPv6 address values allows an attacker-supplied payload to exceed the allocated stack buffer, triggering CWE-120.

An unauthenticated remote attacker can send a crafted HTTP POST request to any of the affected endpoints and achieve arbitrary code execution or a denial-of-service condition on the device. The vulnerability carries a CVSS 3.1 base score of 9.8, reflecting network attack vector, low complexity, and no required credentials or user interaction.

The vendor’s support page for the TEW-820AP does not list a firmware update that resolves the issue; the public technical report on GitHub provides proof-of-concept details but no official patch guidance.

EPSS for the CVE rose from a low baseline to a peak of 0.1988 (current value 0.1648), indicating measurable post-disclosure exploitation interest that warrants renewed attention from network defenders.

EU & UK References

Vulnerability Data

The boa httpd of Trendnet TEW-820AP 1.01.B01 has a stack overflow vulnerability in /boafrm/formIPv6Addr, /boafrm/formIpv6Setup, /boafrm/formDnsv6. The reason is that the check of ipv6 address is not sufficient, which allows attackers to construct payloads for attacks.

CWE(s)
CWE-120

Related Threats

MITRE ATT&CK Enterprise Techniques

T1068 Exploitation for Privilege Escalation Privilege Escalation
Adversaries may exploit software vulnerabilities in an attempt to elevate privileges.
attack.mitre.org →
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 →
T1203 Exploitation for Client Execution Execution
Adversaries may exploit software vulnerabilities in client applications to execute code.
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 →
T1212 Exploitation for Credential Access Credential Access
Adversaries may exploit software vulnerabilities in an attempt to collect credentials.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2023-24098Same product: Trendnet Tew-820Ap
CVE-2023-24099Same product: Trendnet Tew-820Ap
CVE-2023-24095Same product: Trendnet Tew-820Ap
CVE-2023-24096Same product: Trendnet Tew-820Ap
CVE-2023-24097Same product: Trendnet Tew-820Ap
CVE-2023-0617Same vendor: Trendnet
CVE-2025-25523Same vendor: Trendnet
CVE-2024-42813Same vendor: Trendnet
CVE-2023-0612Same vendor: Trendnet
CVE-2026-7607Same vendor: Trendnet

Affected Assets

trendnet
tew-820ap firmware
1.01.b01

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V5.2.1

Mitigating Controls (NIST 800-53 r5) AI

SA-11 Developer Testing and Evaluation good match

Developer testing and analysis can find missing size checks before deployment.

SI-10 Information Input Validation good match

Input validation directly enforces size checks before buffer copies.

SA-8 Security and Privacy Engineering Principles partial match

Engineering principles require bounds checking and safe buffer handling in design.

SI-16 Memory Protection partial match

Memory protection limits the impact of an overflow once it occurs.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

Secure development practices directly enforce bounds checking and input validation that prevent classic buffer overflows.

ID.RA-01 partial match
prevents

Vulnerability identification processes such as code review or scanning detect classic buffer overflows before exploitation.

PR.PS-02 partial match
prevents

Routine patching replaces vulnerable code containing unchecked buffer copies with corrected versions.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.28 Secure coding mostly match
prevents

Secure coding directly requires bounds-checked memory operations, addressing the root cause of CWE-120.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing in development and acceptance can detect buffer overflows through fuzzing and static analysis, though it does not prevent them at the source.

A.8.25 Secure development life cycle partial match
prevents

Secure development life cycle mandates processes that can include input validation and bounds checking to prevent buffer overflows.

A.8.26 Application security requirements partial match
prevents

Application security requirements can specify input-size validation and safe buffer handling to mitigate classic buffer overflows.

A.8.27 Secure system architecture and engineering principles partial match
prevents

Secure system architecture and engineering principles promote defensive coding patterns that reduce the likelihood of unchecked buffer copies.

References