CVE-2026-67856
7.5 HIGHpublic exploit availablePublished 2026-08-04 · Updated 2026-08-05
AI risk analysis
- Summary
- The flaw allows remote attackers to cause a denial of service by sending crafted requests, impacting availability.
- Exploitability
- Exploitation requires sending specific types of requests; preconditions include access to the affected open62541 implementation.
- Blast radius
- If exploited, it could lead to system unavailability for all users, affecting operations relying on the service.
- Prioritized remediation
- Update to a patched version of open62541 or apply vendor-provided patches immediately.
dosicsremote
Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.
NVD description
An issue in open62541 v.1.5.5 and before allows a remote attacker to cause a denial of service via crafted CreateSubscription, CreateMonitoredItems(Sampling), Publish, TransferSubscriptions, and DeleteSubscriptions requests
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-400
Public exploit & PoC references
- https://github.com/open62541/open62541/blob/master/examples/access_control/server_access_control.c
- https://github.com/open62541/open62541/blob/master/src/server/ua_services_subscription.c
- https://github.com/open62541/open62541/blob/master/src/server/ua_subscription.c
- https://github.com/open62541/open62541/blob/master/src/server/ua_subscription.h
- https://github.com/open62541/open62541/issues/8092
- https://github.com/open62541/open62541/issues/8092
All references
- https://github.com/open62541/open62541/blob/master/examples/access_control/server_access_control.c
- https://github.com/open62541/open62541/blob/master/src/server/ua_services_subscription.c
- https://github.com/open62541/open62541/blob/master/src/server/ua_subscription.c
- https://github.com/open62541/open62541/blob/master/src/server/ua_subscription.h
- https://github.com/open62541/open62541/issues/8092
- https://github.com/open62541/open62541/issues/8092
Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.