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Vulnerabilities CVE-2026-67858

CVE-2026-67858

High
Open
TLP:CLEAR

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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.

Details

CVSS Score
7.5
EPSS Score
0.49%

39.6th percentile

CVSS Vector
CVSS:3.1/AC:L/AV:N/A:H/C:N/I:N/PR:N/S:U/UI:N
Confidence
90%
Published
Aug 4, 2026
Last Modified
Aug 5, 2026
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