CVE-2026-8836CWE-119CWE-121

CVE-2026-8836

Critical · published May 18, 2026

CVSS v3.1
9.8
EPSS
2%
Percentile
75.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.01557 · 75.0th percentile
Weaknesses
CWE-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer; CWE-121 · Stack-based Buffer Overflow
Published
2026-05-18T23:16Z
References (8)
https://cgit.git.savannah.gnu.org/cgit/lwip.git/commit/?id=0c957ec03054eb6c8205e9c9d1d05d90ada3898c · [email protected]https://github.com/lwip-tcpip/lwip/commit/0c957ec03054eb6c8205e9c9d1d05d90ada3898c · [email protected]https://savannah.nongnu.org/bugs/?68055 · [email protected]https://savannah.nongnu.org/bugs/?68194 · [email protected]https://vuldb.com/cve/CVE-2026-8836 · [email protected]https://vuldb.com/submit/829798 · [email protected]https://vuldb.com/vuln/364474 · [email protected]https://vuldb.com/vuln/364474/cti · [email protected]
EPSS history
Timeline
  • 18 MAY 18:45Z
    lwIP snmpv3 USM snmp_msg.c snmp_parse_inbound_frame stack-based overflow
    cvelistv5