CVE-2021-31344

medium

Description

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)

References

https://www.tenable.com/cyber-exposure/2021-threat-landscape-retrospective

https://www.tenable.com/blog/nucleus13-13-vulnerabilities-found-in-siemens-nucleus-tcpip-stack

https://cert-portal.siemens.com/productcert/pdf/ssa-845392.pdf

https://cert-portal.siemens.com/productcert/pdf/ssa-620288.pdf

https://cert-portal.siemens.com/productcert/pdf/ssa-223353.pdf

https://cert-portal.siemens.com/productcert/pdf/ssa-114589.pdf

https://cert-portal.siemens.com/productcert/pdf/ssa-044112.pdf

https://cert-portal.siemens.com/productcert/html/ssa-845392.html

https://cert-portal.siemens.com/productcert/html/ssa-620288.html

https://cert-portal.siemens.com/productcert/html/ssa-223353.html

https://cert-portal.siemens.com/productcert/html/ssa-114589.html

https://cert-portal.siemens.com/productcert/html/ssa-044112.html

Details

Source: Mitre, NVD

Published: 2021-11-09

Updated: 2026-06-17

Named Vulnerability: NUCLEUS:13

Risk Information

CVSS v2

Base Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 5.3

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

Severity: Medium

CVSS v4

Base 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

Severity: Medium

EPSS

EPSS: 0.00901