Critical 9.8Published May 18, 2026

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

Updated under an hour ago (Oct 27, 2026, 5:23 AM ET)

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It affects n/a lwIP. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for n/a lwIP

Exploited in the last 30 days

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: 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
Weakness (CWE): CWE-121, CWE-119
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulDB
NVD analysis: Deferred
Record last updated: Aug 22, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

n/a lwIP lwip:lwip	2.1.0; 2.1.1; 2.1.2; 2.1.3; 2.2.0; 2.2.1	CNA record

References

References

https://vuldb.com/vuln/364474	vdb-entry, technical-description
https://vuldb.com/vuln/364474/cti	signature, permissions-required
https://vuldb.com/cve/CVE-2026-8836	third-party-advisory
https://vuldb.com/submit/829798	third-party-advisory
https://savannah.nongnu.org/bugs/?68055	broken-link
https://cgit.git.savannah.gnu.org/cgit/lwip.git/commit/?id=0c957ec03054eb6c8205e9c9d1d05d90ada3898c	broken-link, patch
https://github.com/lwip-tcpip/lwip/commit/0c957ec03054eb6c8205e9c9d1d05d90ada3898c	patch
https://savannah.nongnu.org/bugs/?68194	broken-link

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.