{"id":"CVE-2026-8836","title":"A vulnerability was found in lwIP up to 2.2.1","summary":"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 msgAuthenticationParamet…","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-119","CWE-121"],"published":"2026-05-18","updated":"2026-08-22","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-8836","references":[{"url":"https://cgit.git.savannah.gnu.org/cgit/lwip.git/commit/?id=0c957ec03054eb6c8205e9c9d1d05d90ada3898c","label":"cna@vuldb.com"},{"url":"https://github.com/lwip-tcpip/lwip/commit/0c957ec03054eb6c8205e9c9d1d05d90ada3898c","label":"cna@vuldb.com"},{"url":"https://savannah.nongnu.org/bugs/?68055","label":"cna@vuldb.com"},{"url":"https://savannah.nongnu.org/bugs/?68194","label":"cna@vuldb.com"},{"url":"https://vuldb.com/cve/CVE-2026-8836","label":"cna@vuldb.com"},{"url":"https://vuldb.com/submit/829798","label":"cna@vuldb.com"},{"url":"https://vuldb.com/vuln/364474","label":"cna@vuldb.com"},{"url":"https://vuldb.com/vuln/364474/cti","label":"cna@vuldb.com"}],"tags":["nvd","exploit-available"],"epss":0.01097,"epssPercentile":0.64153,"ingestedAt":"2026-08-22T12:31:57.140Z","exploits":{"github":1,"githubRepos":["https://github.com/Hunt-Benito/lwip-snmpv3-stack-overflow-cve-2026-8836-critical-embedded-rce"],"checkedAt":"2026-09-23T07:15:12.464Z"},"exploitAvailable":true,"slug":"CVE-2026-8836","body":"## Overview\n\nA 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. Two separate issue reports were submitted to the project. Their processing was merged as a duplicate.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"abyssal","depthScore":66,"depthScoreParts":{"impact":53.9,"likelihood":0.2,"exploitation":12,"ransomware":0},"changes":[{"seq":5539,"id":"CVE-2026-8836","ts":1788887298389,"field":"exploit_available","old":"false","new":"true"},{"seq":4414,"id":"CVE-2026-8836","ts":1788886404873,"field":"exploit_available","old":"true","new":"false"},{"seq":3127,"id":"CVE-2026-8836","ts":1788883069671,"field":"exploit_available","old":"false","new":"true"},{"seq":2156,"id":"CVE-2026-8836","ts":1788882472735,"field":"exploit_available","old":"true","new":"false"},{"seq":1185,"id":"CVE-2026-8836","ts":1788881909555,"field":"exploit_available","old":"false","new":"true"}]}