CVE-2026-45160 | ESF-IDF is the Espressif Internet of Things (IOT) Developmen… | CVSS 6.5 MEDIUM

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.

Metadata

CVE ID: CVE-2026-45160
State: PUBLISHED
Assigner: GitHub_M
Reserved: 2026-05-08 20:44 UTC
Published: 2026-06-10 00:26 UTC
Last updated: 2026-06-10 15:10 UTC
Primary CWE: CWE-125
CWE-125: Out-of-bounds Read
Vendor / Product: espressif / esp-idf
Sources: cve.org · NVD

Severity & Metrics

6.5 MEDIUM CVSS 3.1

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC — CISA Coordinator

Exploitation: none
Automatable: no
Tech. Impact: partial

Affected products (1)

Vendor	Product	Platform	Versions
espressif	esp-idf	—	= 5.2.7, = 5.3.5, = 5.4.4, = 5.5.4 …

Weakness (CWE)

CWE	Source	Description
CWE-125	cna	CWE-125: Out-of-bounds Read

CVSS scores (1)

Score	Severity	Version	Source	Vector
6.5	MEDIUM	3.1	cna	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References (7)

https://github.com/espressif/esp-idf/security/advisories/GHSA-g764-gwc3-75m5 https://github.com/espressif/esp-idf/security/advisories/GHSA-g764-gwc3-75m5
https://github.com/espressif/esp-idf/commit/2bf4dd12002dbae60a4b21abff010ecb2b8ee82b https://github.com/espressif/esp-idf/commit/2bf4dd12002dbae60a4b21abff010ecb2b8ee82b
https://github.com/espressif/esp-idf/commit/2da2db43fd7e0bcff9e7b95f54f388296bb6f911 https://github.com/espressif/esp-idf/commit/2da2db43fd7e0bcff9e7b95f54f388296bb6f911
https://github.com/espressif/esp-idf/commit/8b4b5d5301815198d177974ffc24848f47748248 https://github.com/espressif/esp-idf/commit/8b4b5d5301815198d177974ffc24848f47748248
https://github.com/espressif/esp-idf/commit/9f713dbc94982d917f2d12964b233cd9efa4aeba https://github.com/espressif/esp-idf/commit/9f713dbc94982d917f2d12964b233cd9efa4aeba
https://github.com/espressif/esp-idf/commit/d51b1076092487e533eadf8b48c9c8579d3a6712 https://github.com/espressif/esp-idf/commit/d51b1076092487e533eadf8b48c9c8579d3a6712
https://github.com/espressif/esp-idf/commit/fba5f995436a3e3139f768b6d8f1a74d5ce1d318 https://github.com/espressif/esp-idf/commit/fba5f995436a3e3139f768b6d8f1a74d5ce1d318