CVE-2021-31344

6.9 mediumEPSS 1.5%

Medium (6.9) in siemens. EPSS 1.5% chance of exploitation in the next 30 days.

A vulnerability has been identified in Capital Embedded AR Classic 431-422 (All versions), Capital Embedded AR Classic R20-11 (All versions < V2303), PLUSCONTROL 1st Gen (All versions), SIMOTICS CONNECT 400 (All versions < V0.5.0.0), SIMOTICS CONNECT 400 (All versions < 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

CVSS 4.0

6.9 medium

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

CVSS 3.1

5.3 medium

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS: 1.5% chance of exploitation in the next 30 days; higher than 73% of CVEs (scores of 2026-10-31)
CWE: CWE-843
Published: 2021-11-09
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

siemens:apogee_modular_building_controller_firmware
siemens:apogee_modular_equiment_controller_firmware
siemens:apogee_pxc_compact_firmware
siemens:apogee_pxc_modular_firmware
siemens:capital_vstar
siemens:nucleus_net
siemens:nucleus_readystart_v3
siemens:nucleus_readystart_v4
siemens:nucleus_source_code
siemens:talon_tc_compact_firmware
siemens:talon_tc_modular_firmware

References

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