AUGUST 4, 2026
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Case File

CVE-2021-31889

HIGH · CVSS 7.5 EPSS 2.11%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-11-09 · Last synced 2026-08-04

CyberRota Analysis

AI analysis pending.

CVE
CVE-2021-31889
Severity
HIGH
CVSS
7.5
EPSS
2.11%

Original NVD 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). Malformed TCP packets with a corrupted SACK option leads to Information Leaks and Denial-of-Service conditions. (FSMD-2021-0015)