CVE-2024-7490Network attack vector

Unauthenticated code execution via unchecked DHCP option length

Published Aug 8, 2024 · Updated Aug 29, 2025

Stack-based buffer overflow in Microchip Technology ASF 3.52.0.2574 and earlier allows remote attackers to execute code via DHCP requests. In tinydhcpserver.c, lwip_dhcp_find_option reads an attacker-controlled DHCP option size with pbuf_get_at and processes it without requiring the expected four-byte length, overflowing a stack buffer. The example DHCP server must be compiled into device firmware and reachable by a single crafted DHCP Request sent to its multicast address.

CVSS severity9.5
Critical
EPSS probability1.38%
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 Microchip Technology ASF 3.52.0.2574 and earlier allows remote attackers to execute code via DHCP requests. In tinydhcpserver.c, lwip_dhcp_find_option reads an attacker-controlled DHCP option size with pbuf_get_at and processes it without requiring the expected four-byte length, overflowing a stack buffer. The example DHCP server must be compiled into device firmware and reachable by a single crafted DHCP Request sent to its multicast address.

The record

CVE
CVE-2024-7490
Published
Aug 8, 2024
Updated
Aug 29, 2025
Vendor
Microchip Technology
Product
Advanced Software Framework (ASF)
Classifications
CWE-120, CAPEC-100, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 8, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 29, 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=0 <=3.52.0.2574

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Microchip Technology · Advanced Software Framework (ASF)version=0 <=3.52.0.2574
Microchip Technology · Advanced Software Frameworkversion=0 <=3.52.0.2574

Published CVSS scores

9.5Microchip TechnologyCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
9.8NIST NVDCVSS: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-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CAPEC-100Overflow Buffers
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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