{"id":"CVE-2021-31344","aliases":["EUVD-2021-18254","GHSA-47j6-w2j2-7jxf"],"status":"published","title":"A vulnerability has been identified in APOGEE MBC (PPC) (BACnet) (All versions), APOGEE MBC (PPC)...","description":"A vulnerability has been identified in Capital Embedded AR Classic 431-422 (All versions), Capital Embedded AR Classic R20-11 (All versions \u003c V2303), PLUSCONTROL 1st Gen (All versions), SIMOTICS CONNECT 400 (All versions \u003c V0.5.0.0), SIMOTICS CONNECT 400 (All versions \u003c V1.0.0.0). ICMP echo packets with fake IP options allow sending ICMP echo reply messages to arbitrary hosts on the network. (FSMD-2021-0004)","severity":{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.01456,"percentile":0.73664,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-843"],"published":"2021-11-09T11:31:51Z","modified":"2026-06-17T03:51:35Z","products":[{"vendor":"siemens","product":"apogee_modular_building_controller_firmware"},{"vendor":"siemens","product":"apogee_modular_equiment_controller_firmware"},{"vendor":"siemens","product":"apogee_pxc_compact_firmware"},{"vendor":"siemens","product":"apogee_pxc_modular_firmware"},{"vendor":"siemens","product":"capital embedded ar classic 431-422"},{"vendor":"siemens","product":"capital embedded ar classic r20-11"},{"vendor":"siemens","product":"capital_vstar"},{"vendor":"siemens","product":"nucleus_net"},{"vendor":"siemens","product":"nucleus_readystart_v3"},{"vendor":"siemens","product":"nucleus_readystart_v4"},{"vendor":"siemens","product":"nucleus_source_code"},{"vendor":"siemens","product":"pluscontrol 1st gen"},{"vendor":"siemens","product":"simotics connect 400"},{"vendor":"siemens","product":"talon_tc_compact_firmware"},{"vendor":"siemens","product":"talon_tc_modular_firmware"}],"references":[{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-114589.pdf","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-044112.pdf","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-620288.pdf","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-845392.pdf","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-223353.pdf","tags":["x_refsource_MISC","x_transferred"]},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-114589.html"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-044112.html"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-620288.html"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-845392.html"},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-223353.html"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-31344"},{"url":"https://github.com/advisories/GHSA-47j6-w2j2-7jxf"}],"sources":{"cve":[{"id":"CVE-2021-31344","description":"A vulnerability has been identified in Capital Embedded AR Classic 431-422 (All versions), Capital Embedded AR Classic R20-11 (All versions \u003c V2303), PLUSCONTROL 1st Gen (All versions), SIMOTICS CONNECT 400 (All versions \u003c V0.5.0.0), SIMOTICS CONNECT 400 (All versions \u003c V1.0.0.0). ICMP echo packets with fake IP options allow sending ICMP echo reply messages to arbitrary hosts on the network. (FSMD-2021-0004)","status":"published","published":"2021-11-09T11:31:51Z","modified":"2025-03-11T09:47:36.591Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-843"],"updated_at":"2026-11-02T14:33:05.665371Z"}],"euvd":[{"id":"EUVD-2021-18254","description":"A vulnerability has been identified in Capital Embedded AR Classic 431-422 (All versions), Capital Embedded AR Classic R20-11 (All versions \u003c V2303), PLUSCONTROL 1st Gen (All versions), SIMOTICS CONNECT 400 (All versions \u003c V0.5.0.0), SIMOTICS CONNECT 400 (All versions \u003c V1.0.0.0). ICMP echo packets with fake IP options allow sending ICMP echo reply messages to arbitrary hosts on the network. (FSMD-2021-0004)","status":"published","published":"2021-11-09T11:31:51Z","modified":"2025-03-11T09:47:36Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T20:53:08.182954Z"}],"ghsa":[{"id":"GHSA-47j6-w2j2-7jxf","title":"A vulnerability has been identified in APOGEE MBC (PPC) (BACnet) (All versions), APOGEE MBC (PPC)...","description":"A vulnerability has been identified in APOGEE MBC (PPC) (BACnet) (All versions), APOGEE MBC (PPC) (P2 Ethernet) (All versions), APOGEE MEC (PPC) (BACnet) (All versions), APOGEE MEC (PPC) (P2 Ethernet) (All versions), APOGEE PXC Compact (BACnet) (All versions), APOGEE PXC Compact (P2 Ethernet) (All versions), APOGEE PXC Modular (BACnet) (All versions), APOGEE PXC Modular (P2 Ethernet) (All versions), Capital VSTAR (All versions), Nucleus NET (All versions), Nucleus ReadyStart V3 (All versions \u003c V2017.02.4), Nucleus ReadyStart V4 (All versions \u003c V4.1.1), Nucleus Source Code (All versions), TALON TC Compact (BACnet) (All versions), TALON TC Modular (BACnet) (All versions). ICMP echo packets with fake IP options allow sending ICMP echo reply messages to arbitrary hosts on the network. (FSMD-2021-0004)","status":"published","published":"2022-05-24T19:20:11Z","modified":"2024-10-08T09:30:50Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium"},{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"}],"cwes":["CWE-843"],"updated_at":"2026-11-02T14:58:26.306971Z"}],"nvd":[{"id":"CVE-2021-31344","description":"A vulnerability has been identified in Capital Embedded AR Classic 431-422 (All versions), Capital Embedded AR Classic R20-11 (All versions \u003c V2303), PLUSCONTROL 1st Gen (All versions), SIMOTICS CONNECT 400 (All versions \u003c V0.5.0.0), SIMOTICS CONNECT 400 (All versions \u003c V1.0.0.0). ICMP echo packets with fake IP options allow sending ICMP echo reply messages to arbitrary hosts on the network. (FSMD-2021-0004)","status":"published","published":"2021-11-09T12:15:09.087Z","modified":"2026-06-17T03:51:35.01Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-843"],"updated_at":"2026-11-02T14:07:00.984108Z"}]}}