HIGH

CVE-2026-67858

2026-08-04 CVSS v3.1

CVSS

7.5

Description

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.

Weakness (CWE)

CWE-120 Classic Buffer Overflow

EPSS Score

0.48%

Probability of exploitation in next 30 days

40.6th percentile

References

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

View on dbcve.org

Base CVE data derived from NVD (public domain). Enrichment by dbcve.org (CC-BY-4.0). Fetched via API.

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