{"api_version":"1","generated_at":"2026-04-22T21:37:45+00:00","cve":"CVE-2020-28388","urls":{"html":"https://cve.report/CVE-2020-28388","api":"https://cve.report/api/cve/CVE-2020-28388.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2020-28388","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-28388"},"summary":{"title":"CVE-2020-28388","description":"A vulnerability has been identified in APOGEE PXC Compact (BACnet) (All versions < V3.5.5), APOGEE PXC Compact (P2 Ethernet) (All versions < V2.8.20), APOGEE PXC Modular (BACnet) (All versions < V3.5.5), APOGEE PXC Modular (P2 Ethernet) (All versions < V2.8.20), Nucleus NET (All versions < V5.2), Nucleus ReadyStart V3 (All versions < V2012.12), Nucleus Source Code (All versions), PLUSCONTROL 1st Gen (All versions), TALON TC Compact (BACnet) (All versions < V3.5.5), TALON TC Modular (BACnet) (All versions < V3.5.5). Initial Sequence Numbers (ISNs) for TCP connections are derived from an insufficiently random source. As a result, the ISN of current and future TCP connections could be predictable. An attacker could hijack existing sessions or spoof future ones.","state":"PUBLIC","assigner":"productcert@siemens.com","published_at":"2021-02-09 18:15:00","updated_at":"2023-08-08 10:15:00"},"problem_types":["NVD-CWE-Other"],"metrics":[],"references":[{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-180579.pdf","name":"https://cert-portal.siemens.com/productcert/pdf/ssa-180579.pdf","refsource":"MISC","tags":[],"title":"","mime":"application/pdf","httpstatus":"200","archivestatus":"200"},{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-436469.pdf","name":"https://cert-portal.siemens.com/productcert/pdf/ssa-436469.pdf","refsource":"CONFIRM","tags":[],"title":"","mime":"application/pdf","httpstatus":"200","archivestatus":"404"},{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-344238.pdf","name":"https://cert-portal.siemens.com/productcert/pdf/ssa-344238.pdf","refsource":"CONFIRM","tags":[],"title":"","mime":"application/pdf","httpstatus":"200","archivestatus":"0"},{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-362164.pdf","name":"https://cert-portal.siemens.com/productcert/pdf/ssa-362164.pdf","refsource":"MISC","tags":["Vendor 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Initial Sequence Numbers (ISNs) for TCP connections are derived from an insufficiently random source. As a result, the ISN of current and future TCP connections could be predictable. An attacker could hijack existing sessions or spoof future ones."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-342: Predictable Exact Value from Previous Values","cweId":"CWE-342"}]}]},"affects":{"vendor":{"vendor_data":[{"vendor_name":"Siemens","product":{"product_data":[{"product_name":"APOGEE PXC Compact (BACnet)","version":{"version_data":[{"version_affected":"=","version_value":"All versions < V3.5.5"}]}},{"product_name":"APOGEE PXC Compact (P2 Ethernet)","version":{"version_data":[{"version_affected":"=","version_value":"All versions < V2.8.20"}]}},{"product_name":"APOGEE PXC Modular (BACnet)","version":{"version_data":[{"version_affected":"=","version_value":"All versions < V3.5.5"}]}},{"product_name":"APOGEE PXC Modular (P2 Ethernet)","version":{"version_data":[{"version_affected":"=","version_value":"All versions < V2.8.20"}]}},{"product_name":"Nucleus NET","version":{"version_data":[{"version_affected":"=","version_value":"All versions < 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vulnerability has been identified in Capital VSTAR (All versions), Nucleus NET (All versions < V5.2), Nucleus ReadyStart V3 (All versions < V2012.12), Nucleus Source Code (All versions), PLUSCONTROL 1st Gen (All versions). Initial Sequence Numbers (ISNs) for TCP connections are derived from an insufficiently random source. As a result, the ISN of current and future TCP connections could be predictable. An attacker could hijack existing sessions or spoof future ones.","Type":"Description","Title":null},{"CveYear":"2020","CveId":"28388","Ordinal":"2","NoteData":"2021-02-09","Type":"Other","Title":"Published"},{"CveYear":"2020","CveId":"28388","Ordinal":"3","NoteData":"2021-11-09","Type":"Other","Title":"Modified"}]}}}