Is CVE-2026-8836 actively exploited?

No active exploitation of CVE-2026-8836 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-8836 be exploited remotely?

Yes. CVE-2026-8836 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-8836?

CVE-2026-8836 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2026-8836

CWE-119Published: May 18, 2026· Updated: May 18, 2026

9.8

CVSS v3.1

EPSS:0.24%probability of exploitation in 30 daysPercentile:47.3th

Official 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.

NVD Source

Technical Analysis

CVE-2026-8836 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

From a weakness classification perspective (CWE-119): Buffer overflow vulnerabilities can lead to arbitrary code execution or denial of service by corrupting adjacent memory.