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Vulnerability record · CVE-2026-8836 · published 18 May 2026

CVE-2026-8836: Memory buffer overflow vulnerability

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. Two separate issue reports were submitted to the project. Their processing was merged as a duplicate.

8.9 CVSS 4.0 High EPSS 1.6% · top 25.8% CWE-119 · Memory buffer overflowCWE-121 · Stack-based buffer overflow Deferred
8.9CVSS 4.0 base score, v2 10.0
1.6%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
8References
22 Aug 2026Last modified by NVD

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. Two separate issue reports were submitted to the project. Their processing was merged as a duplicate.

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:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://cgit.git.savannah.gnu.org/cgit/lwip.git/commit/?id=0c957ec03054eb6c8205e9c9d1d05d90ada3898c
https://github.com/lwip-tcpip/lwip/commit/0c957ec03054eb6c8205e9c9d1d05d90ada3898c
https://savannah.nongnu.org/bugs/?68055
https://savannah.nongnu.org/bugs/?68194
https://vuldb.com/cve/CVE-2026-8836
https://vuldb.com/submit/829798
https://vuldb.com/vuln/364474
https://vuldb.com/vuln/364474/cti

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Source: NIST National Vulnerability Database (record CVE-2026-8836), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.