CVE-2021-31890
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). The total length of an TCP payload (set in the IP header) is unchecked. This may lead to various side effects, including Information Leak and Denial-of-Service conditions, depending on the network buffer organization in memory. (FSMD-2021-0017)
Scoring
- Severity
- HIGH
- CVSS base score
- 7.5
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS probability
- 2.50%
- CWE
- CWE-240
- Published
- 2021-11-09
- Last modified
- 2026-03-13
Affected products
- Siemens Capital Embedded AR Classic 431-422
- Siemens Capital Embedded AR Classic R20-11
- Siemens PLUSCONTROL 1st Gen
- Siemens SIMOTICS CONNECT 400
- Siemens SIMOTICS CONNECT 400
Weakness type
Related vulnerabilities
- CVE-2025-4321 — DoS in RS9116W-WiSeConnect L2CAP protocol due to reception of malformed packets
- CVE-2023-39915 — Crashes on parsing certain invalid RPKI objects
- CVE-2023-39914 — BER/CER/DER decoder panics on invalid input