{"id":"CVE-2025-3449","title":"A Generation of Predictable Numbers or Identifiers vulnerability in the SDM component of B&R Automation Runtime versions before 6.4 may allow an unauthenticated network-based attacker to take over already established sessions.","summary":"A Generation of Predictable Numbers or Identifiers vulnerability in the SDM component of B&R Automation Runtime versions before 6.4 may allow an unauthenticated network-based attacker to take over already established sessions.","severity":"medium","cvss":4.2,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N","cwe":["CWE-340"],"published":"2025-10-07","updated":"2026-10-08","sourceUpdated":"2026-10-08T22:10:00.563","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-3449","references":[{"url":"https://www.br-automation.com/fileadmin/SA25P003-178b6a20.pdf","label":"cybersecurity@ch.abb.com"}],"tags":["nvd"],"epss":0.00192,"epssPercentile":0.08104,"ingestedAt":"2026-10-08T22:11:53.800Z","slug":"CVE-2025-3449","body":"## Overview\n\nA Generation of Predictable Numbers or Identifiers vulnerability in the SDM component of B&R Automation Runtime versions before 6.4 may allow an unauthenticated network-based attacker to take over already established sessions.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":23,"depthScoreParts":{"impact":23.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}