CVE-2026-8836— lwIP snmpv3 USM snmp_msg.c snmp_parse_inbound_frame stack-based overflow
Possible ATT&CK Techniques 1AI
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I. Basic Information for CVE-2026-8836
Vulnerability Information
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Vulnerability Title
lwIP snmpv3 USM snmp_msg.c snmp_parse_inbound_frame stack-based overflow
Source: NVD (National Vulnerability Database)
Vulnerability Description
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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
栈缓冲区溢出
Source: NVD (National Vulnerability Database)
Vulnerability Title
lwip 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
lwip是lwIP Developers开源的一个开源的TCP/IP协议栈实现。 lwip 2.2.1及之前版本存在缓冲区错误漏洞，该漏洞源于snmpv3 USM Handler组件中文件src/apps/snmp/snmp_msg.c的函数snmp_parse_inbound_frame对参数msgAuthenticationParameters的操作导致栈缓冲区溢出，可能允许远程攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| - | lwIP | 2.1.0 | cpe:2.3:a:n:lwip:*:*:*:*:*:*:*:* |
II. Public POCs for CVE-2026-8836
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patch · 2Other · 1
Same Patch Batch · n/a · 2026-05-18 · 13 CVEs total
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| CVE-2023-24215 | NOVUS Automation AirGate 4G firmware 安全漏洞 | |
| CVE-2026-41085 | Thermo Fisher Scientific Torrent Suite Dx 安全漏洞 | |
| CVE-2026-38719 | OpENer 缓冲区错误漏洞 | |
| CVE-2026-29964 | HSC MailInspector 跨站脚本漏洞 | |
| CVE-2026-29962 | HSC MailInspector 安全漏洞 | |
| CVE-2026-29965 | HSC MailInspector 跨站脚本漏洞 | |
| CVE-2026-29963 | HSC MailInspector 安全漏洞 |
IV. Related Vulnerabilities
Same weakness: CWE-121
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Stack buffer overflow in desktop.c - CVE-2026-44048
Stack buffer overflow via UCS-2 type confusion in convert_ch - CVE-2026-9150
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V. Comments for CVE-2026-8836
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