CVE-2026-45160
What it is
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.
At a glance
- Exploitability
- Can be exploited from the same network segment without logging in. High risk of service disruption.
- Exploit odds
- 0.2% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 0.2% in the next 30 days (EPSS).
- Severity: 6.5 MEDIUM (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 0.2% · EPSS, next 30 days
- Weakness
- CWE-125 · Out-of-bounds read
- Record status
- Analyzed
Affected
- Espressif esp-idf 5.2.7
- Espressif esp-idf 5.3.5
- Espressif esp-idf 5.4.4
- Espressif esp-idf 5.5.4
- Espressif esp-idf 6.0.1
Attack profile CVSS 3.1 · 6.5
- Attack vector
- Adjacent network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Raw vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2026-45160.md and follow it. Check whether this project is affected by CVE-2026-45160. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://github.com/espressif/esp-idf/commit/2bf4dd12002dbae60a4b21abff010ecb2b8ee82b
- https://github.com/espressif/esp-idf/commit/2da2db43fd7e0bcff9e7b95f54f388296bb6f911
- https://github.com/espressif/esp-idf/commit/8b4b5d5301815198d177974ffc24848f47748248
- https://github.com/espressif/esp-idf/commit/9f713dbc94982d917f2d12964b233cd9efa4aeba
- https://github.com/espressif/esp-idf/commit/d51b1076092487e533eadf8b48c9c8579d3a6712
- https://github.com/espressif/esp-idf/commit/fba5f995436a3e3139f768b6d8f1a74d5ce1d318
- https://github.com/espressif/esp-idf/security/advisories/GHSA-g764-gwc3-75m5
References
- https://github.com/espressif/esp-idf/commit/2bf4dd12002dbae60a4b21abff010ecb2b8ee82b
- https://github.com/espressif/esp-idf/commit/2da2db43fd7e0bcff9e7b95f54f388296bb6f911
- https://github.com/espressif/esp-idf/commit/8b4b5d5301815198d177974ffc24848f47748248
- https://github.com/espressif/esp-idf/commit/9f713dbc94982d917f2d12964b233cd9efa4aeba
- https://github.com/espressif/esp-idf/commit/d51b1076092487e533eadf8b48c9c8579d3a6712
- https://github.com/espressif/esp-idf/commit/fba5f995436a3e3139f768b6d8f1a74d5ce1d318
- https://github.com/espressif/esp-idf/security/advisories/GHSA-g764-gwc3-75m5