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CVE-2026-63035
A heap use-after-free vulnerability in the TransferSubscriptions service in open62541 may allow an authenticated attacker to cause a denial of service or potentially execute arbitrary code.
This record: live connection— last retrieved: 24 September 2026 at 05:13.
Taken directly from NVD, CISA or the vendor — sometimes in English, unchanged from the source.
A heap use-after-free vulnerability in the TransferSubscriptions service in open62541 may allow an authenticated attacker to cause a denial of service or potentially execute arbitrary code.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Attack vector
NETWORK
Privileges required
LOW
User interaction
NONE
Confidentiality
None
Integrity
High
Availability
High
Probability of exploitation within 30 days
0.6%
Percentile
46e
Source: FIRST.org, updated on 23 September 2026.
o6 Automation has prepared mitigations and fixes to address these issues and recommends that users update to the newest version. The new version can be obtained by contacting o6 Automation https://www.o6-automation.com/contact or by downloading from the following locations:
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 8.1, EPSS 0.6%, industrial relevance 40/100.
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.
No strong energy-sector-specific signals recognised; general OT/ICS relevance.
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 24 September 2026.
IEC 62443 mapping
Automatic IACS Radar assessment based on the reported CWE weakness classification; not an official certification statement.