CVE-2024-46047Public exploit

Router crash via oversized DHCP client list

Published Sep 13, 2024 · Updated Sep 13, 2024

Stack-based buffer overflow in Tenda FH451 Firmware 1.0.0.9 allows remote attackers to crash the router via a crafted HTTP request. The fromDhcpListClient handler accepts an oversized list1 form value, overwrites the LISTEN stack pointer, and passes the corrupted pointer to atoi during a second loop. Network reachability to the management handler is required; the documented consequence is a crash and service interruption, with no reported data disclosure or modification.

CVSS severity7.5
High
EPSS probability0.61%
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 FH451 Firmware 1.0.0.9 allows remote attackers to crash the router via a crafted HTTP request. The fromDhcpListClient handler accepts an oversized list1 form value, overwrites the LISTEN stack pointer, and passes the corrupted pointer to atoi during a second loop. Network reachability to the management handler is required; the documented consequence is a crash and service interruption, with no reported data disclosure or modification.

The record

CVE
CVE-2024-46047
Published
Sep 13, 2024
Updated
Sep 13, 2024
Vendor
Shenzhen Tenda Technology Co., Ltd.
Product
FH451 Firmware
Classifications
CWE-787, CWE-121, T1499.004
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 13, 2024CVE publishedPublication date reported by the CVE source.
  2. Sep 13, 2024Record 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=1.0.0.9

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Shenzhen Tenda Technology Co., Ltd. · FH451 Firmwareversion=1.0.0.9

Published CVSS scores

6.5CISA-ADPCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
CWE-121Stack-based Buffer Overflow
T1499.004Application or System Exploitation

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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