Read the docs
TI-2026-32988 Aliases CVE-2026-45160

ESF-IDF: Out-of-bounds Read in lwIP DHCP Server Option Parser

Priority LOW 28CWE-125Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-125 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00246 15th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
espressifesp-idf= 5.2.7; = 5.3.5; = 5.4.4; = 5.5.4; = 6.0.1—No fix listedCNA
  • esp-idf Vendorespressif Affected = 5.2.7; = 5.3.5; = 5.4.4; = 5.5.4; = 6.0.1 Fixed in — No fix listed CNA

CPE configurations NVD · 5

CPEVersionsRoleVendor
cpe:2.3:a:espressif:esp-idf:5.2.7:*:*:*:*:*:*:*5.2.7Vulnerableespressif
cpe:2.3:a:espressif:esp-idf:5.3.5:*:*:*:*:*:*:*5.3.5Vulnerableespressif
cpe:2.3:a:espressif:esp-idf:5.4.4:*:*:*:*:*:*:*5.4.4Vulnerableespressif
cpe:2.3:a:espressif:esp-idf:5.5.4:*:*:*:*:*:*:*5.5.4Vulnerableespressif
cpe:2.3:a:espressif:esp-idf:6.0.1:*:*:*:*:*:*:*6.0.1Vulnerableespressif
  • cpe:2.3:a:espressif:esp-idf:5.2.7:*:*:*:*:*:*:* Versions 5.2.7 Vulnerable ·espressif
  • cpe:2.3:a:espressif:esp-idf:5.3.5:*:*:*:*:*:*:* Versions 5.3.5 Vulnerable ·espressif
  • cpe:2.3:a:espressif:esp-idf:5.4.4:*:*:*:*:*:*:* Versions 5.4.4 Vulnerable ·espressif
  • cpe:2.3:a:espressif:esp-idf:5.5.4:*:*:*:*:*:*:* Versions 5.5.4 Vulnerable ·espressif
  • cpe:2.3:a:espressif:esp-idf:6.0.1:*:*:*:*:*:*:* Versions 6.0.1 Vulnerable ·espressif

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-45160

References

Patch 7

  • TI-2024-22076 Buffer Overflow vulnerability in esp-idf v.5.1 allows a remote attacker to execute… CVSS 3.1MEDIUM 6.5
  • TI-2026-33125 ESF-IDF: Out-of-Bounds Write in ESP-TEE Secure Service Wrappers CVSS 3.1CRITICAL 9.3
  • TI-2025-32598 ESP-NOW Integer Underflow Vulnerability Advisory CVSS 4.0HIGH 7.2
  • TI-2022-08703 Espressif Bluetooth Mesh Stack Vulnerable to Out-of-bounds Write leading to memory buffer corruption CVSS 3.1HIGH 8.8
  • TI-2021-09371 The Bluetooth Classic implementation in Espressif ESP-IDF 4.4 and earlier does not… CVSS 3.1HIGH 8.8
  • TI-2026-33292 ESF-IDF: Remote Null Pointer Dereference in WebSocket Server CVSS 3.1HIGH 7.5
See all 30 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences