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CVE-2026-45160— ESF-IDF: Out-of-bounds Read in lwIP DHCP Server Option Parser

Quick assessment

Affected
espressif esp-idf
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

ESP-IDF是Espressif开源的一个 Windows、Linux 和 macOS 上支持的 Espressif SoC 的开发框架。 ESP-IDF 5.2.7版本、5.3.5版本、5.4.4版本、5.5.4版本和6.0.1版本存在缓冲区错误漏洞，该漏洞源于DHCP服务器选项解析器中越界读取问题，解析器在遍历BOOTP/DHCP选项字段时未验证每个选项的长度字节和声明有效载荷长度是否在接收数据包缓冲区范围内，精心构造的DHCP请求可能导致解析器读取超出选项缓冲区末尾进入相邻堆内存。

CVSS 6.5 · Medium EPSS 0.40% · P32

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 5

VendorProduct Version RangeStatus
espressif esp-idf = 5.2.7 affected
= 5.3.5 affected
= 5.4.4 affected
= 5.5.4 affected
= 6.0.1 affected
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I. Basic Information for CVE-2026-45160

Vulnerability Information
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Vulnerability Title
ESF-IDF: Out-of-bounds Read in lwIP DHCP Server Option Parser
Source: CVE Program / CVE List V5
Vulnerability Description
ESF-IDF is the Espressif Internet of Things (IOT) Development Framework. In versions 5.2.7, 5.3.5, 5.4.4, 5.5.4, and 6.0.1, an out-of-bounds read flaw exists in the DHCP server option parser (parse_options() in components/lwip/apps/dhcpserver/dhcpserver.c) shipped with ESP-IDF's lwIP component. The parser walks the BOOTP/DHCP options field without validating that each option's length byte and declared payload length stay within the received packet buffer. A crafted DHCP request can cause the parser to read past the end of the options buffer into adjacent heap memory. The issue affects the DHCP server used by ESP-IDF's SoftAP and any configuration where the device runs as a DHCP server on a local network. This issue has been patched in versions 5.2.8, 5.3.6, 5.4.5, 5.5.5, and 6.0.2.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
ESP-IDF 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ESP-IDF是Espressif开源的一个 Windows、Linux 和 macOS 上支持的 Espressif SoC 的开发框架。 ESP-IDF 5.2.7版本、5.3.5版本、5.4.4版本、5.5.4版本和6.0.1版本存在缓冲区错误漏洞，该漏洞源于DHCP服务器选项解析器中越界读取问题，解析器在遍历BOOTP/DHCP选项字段时未验证每个选项的长度字节和声明有效载荷长度是否在接收数据包缓冲区范围内，精心构造的DHCP请求可能导致解析器读取超出选项缓冲区末尾进入相邻堆内存。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
espressif esp-idf = 5.2.7 -

II. Public POCs for CVE-2026-45160

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III. Intelligence Information for CVE-2026-45160

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Patches & Fixes for CVE-2026-45160 (6)

Vendor Advisories for CVE-2026-45160 (1)

Same Patch Batch · espressif · 2026-06-10 · 6 CVEs total

CVE-2026-45328 9.3 CRITICAL ESF-IDF: Out-of-Bounds Write in ESP-TEE Secure Service Wrappers
CVE-2026-45541 7.5 HIGH ESF-IDF: Remote Null Pointer Dereference in WebSocket Server
CVE-2026-45542 7.1 HIGH ESF-IDF: Heap buffer overflow in protocomm Security2 over Bluetooth
CVE-2026-45329 7.1 HIGH ESF-IDF: Out-of-Bounds Read in ESP-TEE Secure Service Wrappers
CVE-2026-46532 4.6 MEDIUM ESF-IDF: Heap Out-of-Bounds Read in Bluedroid AVRCP Target Parser

IV. Related Vulnerabilities

Same product: esp-idf
Same vendor: espressif
Same weakness: CWE-125

V. Comments for CVE-2026-45160

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