Stack-based Buffer Overflow in lwIP Product by lwIP Vendor
CVE-2026-8836

9.3CRITICAL

Key Information:

Vendor

lwIP

Status
Lwip
Vendor
CVE Published:
18 May 2026

What is CVE-2026-8836?

A vulnerability exists in lwIP due to a stack-based buffer overflow in the snmp_parse_inbound_frame function of the SNMPv3 USM Handler. This flaw arises from manipulating the msgAuthenticationParameters argument, which may potentially allow an attacker to exploit the vulnerability remotely. A patch is available to mitigate this issue, and it is strongly recommended that users apply it to enhance their security.

Affected Version(s)

lwIP 2.1.0

lwIP 2.1.1

lwIP 2.1.2

References

https://vuldb.com/vuln/364474
vdb-entrytechnical-description
https://vuldb.com/vuln/364474/cti
signaturepermissions-required
https://vuldb.com/submit/829798
third-party-advisory

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

0rbitingZer0 (VulDB User)
.