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CVE-2026-45160 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:6.5 MEDIUMVector:CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/espressif/esp-idf/commit/2bf4dd12002dbae60a4b21abff010ecb2b8ee82b	[email protected]	Patch
https://github.com/espressif/esp-idf/commit/2da2db43fd7e0bcff9e7b95f54f388296bb6f911	[email protected]	Patch
https://github.com/espressif/esp-idf/commit/8b4b5d5301815198d177974ffc24848f47748248	[email protected]	Patch
https://github.com/espressif/esp-idf/commit/9f713dbc94982d917f2d12964b233cd9efa4aeba	[email protected]	Patch
https://github.com/espressif/esp-idf/commit/d51b1076092487e533eadf8b48c9c8579d3a6712	[email protected]	Patch
https://github.com/espressif/esp-idf/commit/fba5f995436a3e3139f768b6d8f1a74d5ce1d318	[email protected]	Patch
https://github.com/espressif/esp-idf/security/advisories/GHSA-g764-gwc3-75m5	[email protected]	MitigationPatchVendor Advisory

see all 7 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-125	Out-of-bounds Read	[email protected]

Affected Products

Product	Versions
espressif esp-idf	5.2.7 5.3.5 5.4.4 5.5.4 6.0.1
CPE cpe:2.3:a:espressif:esp-idf:5.2.7:::::::* cpe:2.3:a:espressif:esp-idf:5.3.5:::::::* cpe:2.3:a:espressif:esp-idf:5.4.4:::::::* cpe:2.3:a:espressif:esp-idf:5.5.4:::::::* cpe:2.3:a:espressif:esp-idf:6.0.1:::::::* Remediation No remediation found in references.

Change History

5 change records found show changes

Date	Action	Recorded By
Jul 23, 2026	CVE Translated	[email protected]
Jun 17, 2026	CVE Modified	[email protected]
Jun 17, 2026	CVE Modified	CISA-ADP
Jun 11, 2026	Initial Analysis	[email protected]
Jun 10, 2026	New CVE Received	[email protected]