EUVD-2026-30793
GHSA-3w8m-3w76-f6mh
CVSS VectorNVD
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:X/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:X/V:X/RE:X/U:X
Lifecycle Timeline
3DescriptionNVD
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.
AnalysisAI
Stack-based buffer overflow in lwIP through 2.2.1 enables remote unauthenticated attackers to corrupt stack memory in the SNMPv3 USM handler by sending a crafted msgAuthenticationParameters field to snmp_parse_inbound_frame in src/apps/snmp/snmp_msg.c. The flaw stems from a commented-out length assertion that allowed user-controlled TLV value lengths to exceed SNMP_V3_MAX_AUTH_PARAM_LENGTH during decoding. …
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RemediationAI
Within 24 hours: Conduct inventory of all systems, IoT devices, and network appliances using lwIP; prioritize critical infrastructure and internet-facing deployments. Within 7 days: Apply available vendor patches to all affected systems; if patching is not immediately feasible, restrict SNMPv3 network access at perimeter firewalls. …
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