lwIP snmpv3 USM snmp_msg.c snmp_parse_inbound_frame stack-based overflow_CVE-2026-8836

9.3 / 10

CRITICAL

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

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.

AI Analysis

Stack-based buffer overflow vulnerability in lwIP snmpv3 USM Handler

Basic Information

ID CVE-2026-8836

Source VulDB

Published May 18, 2026 at 18:45

Affected Product

Vendor n/a

Product lwIP

Version 2.1.0

Affected Versions n/a lwIP 2.1.0
n/a lwIP 2.1.1
n/a lwIP 2.1.2
n/a lwIP 2.1.3
n/a lwIP 2.2.0
n/a lwIP 2.2.1

CWE Classification

CWE-121 CWE-119

AI Assessment

AI Score 9.3 / 10

AI Severity Critical

Vendor Savannah

Product lwIP

Version 2.1.0, 2.1.1, 2.1.2, 2.1.3, 2.2.0, 2.2.1

References

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    "lastseen": "",
    "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.",
    "published": "2026-05-18T18:45:12.791Z",
    "modified": "2026-05-18T18:45:12.791Z",
    "type": "cve",
    "title": "lwIP snmpv3 USM snmp_msg.c snmp_parse_inbound_frame stack-based overflow",
    "source": "VulDB",
    "references": "https://vuldb.com/vuln/364474\nhttps://vuldb.com/vuln/364474/cti\nhttps://vuldb.com/submit/829798\nhttps://savannah.nongnu.org/bugs/?68194\nhttps://cgit.git.savannah.gnu.org/cgit/lwip.git/commit/?id=0c957ec03054eb6c8205e9c9d1d05d90ada3898c\nhttps://github.com/lwip-tcpip/lwip/commit/0c957ec03054eb6c8205e9c9d1d05d90ada3898c",
    "id": "CVE-2026-8836",
    "bulletinFamily": "",
    "cwe": [
        "CWE-121",
        "CWE-119"
    ],
    "cvelist": null,
    "sourceData": "n/a lwIP 2.1.0\nn/a lwIP 2.1.1\nn/a lwIP 2.1.2\nn/a lwIP 2.1.3\nn/a lwIP 2.2.0\nn/a lwIP 2.2.1",
    "sourceHref": "",
    "cvss": {
        "score": 9.3,
        "severity": "CRITICAL",
        "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",
        "version": "4.0"
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        "cvssV3": {
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    "href": "",
    "category_name": "CVE",
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    "product": "lwIP",
    "version": "2.1.0",
    "vendor": "n/a",
    "ai_description": "Stack-based buffer overflow vulnerability in lwIP snmpv3 USM Handler",
    "ai_severity": "Critical",
    "ai_vendor": "Savannah",
    "ai_product": "lwIP",
    "ai_version": "2.1.0, 2.1.1, 2.1.2, 2.1.3, 2.2.0, 2.2.1",
    "ai_score": 9.3
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