CVE-2026-8836 CRITICAL

CVE-2026-8836: lwIP snmpv3 USM snmp_msg.c snmp_parse_inbound_frame stack-based overflow

Vendor N/A
Product lwIP
Weakness CWE-121
Published May 18, 2026
Last update May 23, 2026
View on NVD All CVEs

CVSS base score

9.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X

What the vulnerability does

01Description

A vulnerability was found in lwIP up to 2.2.1. Affected is the function snmp_parse_inbound_frame of the file src/apps/snmp/snmp_msg.c of the component snmpv3 USM Handler. Performing a manipulation of the argument msgAuthenticationParameters results in stack-based buffer overflow. The attack may be initiated remotely. The patch is named 0c957ec03054eb6c8205e9c9d1d05d90ada3898c. It is suggested to install a patch to address this issue.

Key dates

02Disclosure timeline

May 18, 2026 CVE published
May 23, 2026 Record updated