Out-of-bounds read in ESP-IDF - CVE-2026-45160
Published: May 21, 2026
Vulnerability identifier: #VU132087
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-45160
CWE-ID: CWE-125
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vendor: Espressif Systems
Affected software:
ESP-IDF
ESP-IDF
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to out-of-bounds read in parse_options() in components/lwip/apps/dhcpserver/dhcpserver.c when parsing crafted DHCP requests. A remote attacker can send a specially crafted DHCP broadcast request to cause a denial of service.
The issue affects devices running the DHCP server on a local network, including SoftAP deployments.
How to mitigate CVE-2026-45160
Install security update from vendor's website.