7.5

CVE-2026-67858

Buffer Overflow vulnerability exists in open62541 1.5.5 when the Local Discovery Server (LDS) is built with multicast discovery enabled through the MDNSD backend. An unauthenticated remote attacker can send a RegisterServer or RegisterServer2 request containing many unique discoveryUrls. This allows remote attackers to cause a denial of service.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
VulnDex Vulnerability Enrichment
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EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.49% 0.393
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
MITRE 7.5 3.9 3.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.

https://github.com/open62541/open62541/issues/8094
https://github.com/open62541/open62541/tree/master/examples/discovery
https://github.com/open62541/open62541/blob/master/src/server/ua_services_discovery.c
https://github.com/open62541/open62541/blob/master/src/server/ua_discovery_mdns.c
https://github.com/open62541/open62541/blob/master/doc/building.rst