CVE-2023-49351Network attack vector

Unauthenticated stack overwrite via unbounded USB input

Published Jan 16, 2024 · Updated Jun 2, 2025

Stack-based buffer overflow in Edimax BR-6478AC V2 firmware 1.23 allows remote attackers to overwrite stack memory via a crafted request. The formUSBAccount handler at /goform/formUSBAccount copies attacker-controlled input into a fixed-size stack buffer with strcpy() without enforcing a length bound. Network access to the web management interface is sufficient and requires no authentication or user interaction; the overwrite can crash the service or corrupt adjacent control data.

CVSS severity9.8
Critical
EPSS probability0.57%
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 Edimax BR-6478AC V2 firmware 1.23 allows remote attackers to overwrite stack memory via a crafted request. The formUSBAccount handler at /goform/formUSBAccount copies attacker-controlled input into a fixed-size stack buffer with strcpy() without enforcing a length bound. Network access to the web management interface is sufficient and requires no authentication or user interaction; the overwrite can crash the service or corrupt adjacent control data.

The record

CVE
CVE-2023-49351
Published
Jan 16, 2024
Updated
Jun 2, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 16, 2024CVE publishedPublication date reported by the CVE source.
  2. Jun 2, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/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.

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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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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