CVE-2026-45160
MediumCVSS 6.5Exploitation Probability (EPSS)
Low risk5th percentile — higher than 5% of all known CVEs
Summary
The ESP-IDF framework has a vulnerability in versions 5.2.7, 5.3.5, 5.4.4, 5.5.4, and 6.0.1 related to an out-of-bounds read flaw in the DHCP server option parser. This vulnerability allows reading adjacent memory, potentially leading to unauthorized access to data.
Risk Assessment
Organizations using affected versions may be exposed to attacks that exploit this vulnerability to read sensitive data from memory. This could lead to a breach of local network security.
Recommendation
It is recommended to upgrade to versions 5.2.8, 5.3.6, 5.4.5, 5.5.5, or 6.0.2, which contain fixes that address this vulnerability.
Original NVD description (English source)
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.