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Vulnerability record · CVE-2026-67869 · published 6 August 2026

CVE-2026-67869: Classic buffer overflow vulnerability

Buffer Overflow vulnerability in open62541 v1.5.5 allows a remote attacker to cause a denial of service via the Service_Call validates input arguments against runtime-resolved InputArguments metadata

7.5 CVSS 3.1 High EPSS 0.82% · top 44.5% CWE-120 · Classic buffer overflow Deferred
7.5CVSS 3.1 base score
0.82%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
5References
31 Aug 2026Last modified by NVD

Description

Buffer Overflow vulnerability in open62541 v1.5.5 allows a remote attacker to cause a denial of service via the Service_Call validates input arguments against runtime-resolved InputArguments metadata

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

LinkTags
https://github.com/open62541/open62541/blob/v1.5.5/examples/tutorial_server_alarms_conditions.c
https://github.com/open62541/open62541/blob/v1.5.5/src/server/ua_services_method.c
https://github.com/open62541/open62541/blob/v1.5.5/src/server/ua_subscription_alarms_conditions.c
https://github.com/open62541/open62541/issues/8171
https://github.com/open62541/open62541/issues/8171

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Source: NIST National Vulnerability Database (record CVE-2026-67869), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.