Cyber Resilience

CVE-2024-48420

Memory Safety in Edimax Br-6476Ac Firmware 1.06

Public PoCMemory Safety
Published
27 January 2025
Modified
05 July 2026
CVSS Score v3.1 8.8
Click a component to see what it means
Raw vectorCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0040 33th percentile
Risk Priority 64 floored blend · peak EPSS

Summary

CVE-2024-48420 is a high-severity Classic Buffer Overflow (CWE-120) vulnerability in Edimax Br-6476Ac Firmware. Its CVSS base score is 8.8 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked at the 33th percentile by exploit likelihood (below the median); 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-2024-48420 is a buffer overflow vulnerability (CWE-120) affecting the Edimax AC1200 Wi-Fi 5 Dual-Band Router model BR-6476AC running firmware version 1.06. The issue resides in the web interface endpoint /goform/getWifiBasic, where insufficient bounds checking on user-supplied input leads to a stack-based buffer overflow. This flaw has a CVSS v3.1 base score of 8.8 (High), reflecting its potential for significant impact.

An attacker with adjacent network access (AV:A), such as from the same local Wi-Fi network, can exploit this vulnerability with low complexity (AC:L), no authentication requirements (PR:N), and no user interaction (UI:N). Successful exploitation allows arbitrary code execution with high impacts on confidentiality, integrity, and availability (C:H/I:H/A:H), potentially enabling full router compromise, such as persistent access, data theft, or network pivoting.

Mitigation details are outlined in vendor and security advisories, available at http://edimax.com and https://github.com/SpikeReply/advisories/blob/c271ddb997bc0263274118acc380bc71ce9c316b/cve/edimax/cve-2024-48420.md. Security practitioners should check these resources for firmware patches, workarounds, or updated configurations specific to the BR-6476AC.

EU & UK References

Vulnerability Data

Edimax AC1200 Wi-Fi 5 Dual-Band Router BR-6476AC 1.06 is vulnerable to Buffer Overflow via /goform/getWifiBasic.

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-2024-48416Same product: Edimax Br-6476Ac
CVE-2024-48419Same product: Edimax Br-6476Ac
CVE-2024-48418Same product: Edimax Br-6476Ac
CVE-2024-48417Same product: Edimax Br-6476Ac
CVE-2025-22907Same vendor: Edimax
CVE-2025-22916Same vendor: Edimax
CVE-2025-22913Same vendor: Edimax
CVE-2025-22904Same vendor: Edimax
CVE-2025-22911Same vendor: Edimax
CVE-2025-28144Same vendor: Edimax

Affected Assets

edimax
br-6476ac firmware
1.06

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