CVE-2026-9425Public exploitNetwork attack vector

Authenticated device crash via unchecked parameter copy

Published May 25, 2026 · Updated May 25, 2026

Stack-based buffer overflow in Edimax EW-7438RPn 1.31 allows remote authenticated users to crash the device through its web interface. The formWlanMP handler copies oversized POST parameters such as ateFunc into a stack-local buffer without checking their length, overwriting the saved return address. Low-privileged web-interface access is required; the published proof of concept demonstrates a persistent service crash, while the overwrite permits arbitrary code execution.

CVSS severityUnavailable
Unscored
EPSS probability0.45%
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 EW-7438RPn 1.31 allows remote authenticated users to crash the device through its web interface. The formWlanMP handler copies oversized POST parameters such as ateFunc into a stack-local buffer without checking their length, overwriting the saved return address. Low-privileged web-interface access is required; the published proof of concept demonstrates a persistent service crash, while the overwrite permits arbitrary code execution.

The record

CVE
CVE-2026-9425
Published
May 25, 2026
Updated
May 25, 2026
Vendor
Edimax Technology Co., Ltd.
Product
EW-7438RPn
Classifications
CWE-119, CWE-121, T1210
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 25, 2026CVE publishedPublication date reported by the CVE source.
  2. May 25, 2026Record 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=1.31

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Edimax Technology Co., Ltd. · EW-7438RPnversion=1.31

Published CVSS scores

7.4VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P

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 exploitPublished

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-121Stack-based Buffer Overflow
T1210Exploitation of Remote Services

Public exploit references

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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