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CVE-2025-3450
An Improper Resource Locking vulnerability in the SDM component of B&R Automation Runtime versions before 6.3 and before Q4.93 may allow an unauthenticated network-based attacker to delete data causing denial of service conditions.
This record: live connection— last retrieved: 7 November 2026 at 20:01.
Published
7 October 2025
Last modified
18 October 2026
Taken directly from NVD, CISA or the vendor — sometimes in English, unchanged from the source.
An Improper Resource Locking vulnerability in the SDM component of B&R Automation Runtime versions before 6.3 and before Q4.93 may allow an unauthenticated network-based attacker to delete data causing denial of service conditions.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:H
Attack vector
NETWORK
Privileges required
NONE
User interaction
NONE
Confidentiality
None
Integrity
High
Availability
High
Probability of exploitation within 30 days
0.3%
Percentile
20e
Source: FIRST.org, updated on 7 November 2026.
The problem is corrected in Automation Runtime versions 6.3 and Q4.93. The System Diagnostic Manager (SDM) is disabled by default in Automation Runtime 6 and is not in-tended be enabled on active systems located outside properly secured production networks or in facilities lacking adequate physical and logical access controls to prevent any form of unauthorized interaction. For customers who use SDM on their systems, B&R recommends applying the update at the earliest convenience. The process to install updates is described in the user manual. The step to identify the installed product version is described in the user manual.
Our own interpretation and context for the source data above.
IACS Radar assessment
Our own interpretation and context for this vulnerability — not an official source.
IACS Radar priority score
Based on CVSS 10.0, EPSS 0.3%, industrial relevance 55/100.
Combines CVSS, EPSS, KEV status, industrial relevance and exposure relevance — a complement to, not a replacement for, the individual scores below and above.
Conditions for exploitation
Operational impact & energy relevance
Possible loss of visibility of or control over the process upon successful exploitation.
Assessed as relevant to the energy sector based on: Vermeld in een officiële CISA ICS Advisory, wat directe relevantie voor industriële besturingssystemen bevestigt. Vendor "B&R Industrial Automation GmbH" is a known supplier of equipment for the energy sector.
Recommended defensive measures
Industrial relevance score
Classification is provisional; manual verification by an OT security analyst is recommended.
Classified by IACS Radar-analysepijplijn (geautomatiseerd) on 7 November 2026.
IEC 62443 mapping
Automatic IACS Radar assessment based on the reported CWE weakness classification; not an official certification statement.