CVE-2024-0540Network attack vector

Authenticated memory corruption via unbounded ssidIndex

Published Jan 15, 2024 · Updated Jun 3, 2025

Stack-based buffer overflow in Tenda W9 1.0.0.7(4456) allows remote authenticated users to corrupt httpd memory via ssidIndex. The formOfflineSet function fails to bound the attacker-controlled ssidIndex value before it overwrites adjacent stack memory. Reaching the handler requires authenticated HTTP access; exploitation corrupts httpd memory and can disclose or alter process data or interrupt the service.

CVSS severity6.3
Medium
EPSS probability0.79%
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 Tenda W9 1.0.0.7(4456) allows remote authenticated users to corrupt httpd memory via ssidIndex. The formOfflineSet function fails to bound the attacker-controlled ssidIndex value before it overwrites adjacent stack memory. Reaching the handler requires authenticated HTTP access; exploitation corrupts httpd memory and can disclose or alter process data or interrupt the service.

The record

CVE
CVE-2024-0540
Published
Jan 15, 2024
Updated
Jun 3, 2025
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
W9
Classifications
CWE-787, CWE-121, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 15, 2024CVE publishedPublication date reported by the CVE source.
  2. Jun 3, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0.0.7(4456)

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Shenzhen Tenda Technology Co., Ltd. · W9version=1.0.0.7(4456)

Published CVSS scores

9.8NISTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P
6.3VulDBCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
CWE-121Stack-based Buffer Overflow
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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