CVE-2026-67858
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 0.5%
exploitation probability
0.5%top 61% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:3.1/AC:L/AV:N/A:H/C:N/I:N/PR:N/S:U/UI:N
Affected products
n/a · n/aReferences
https://github.com/open62541/open62541/blob/master/doc/building.rsthttps://github.com/open62541/open62541/blob/master/src/server/ua_discovery_mdns.chttps://github.com/open62541/open62541/blob/master/src/server/ua_services_discovery.chttps://github.com/open62541/open62541/issues/8094https://github.com/open62541/open62541/tree/master/examples/discovery