AUGUST 4, 2026
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Case File

CVE-2021-33737

HIGH · CVSS 7.5 EPSS 1.06%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-09-14 · Last synced 2026-08-04

CyberRota Analysis

AI analysis pending.

CVE
CVE-2021-33737
Severity
HIGH
CVSS
7.5
EPSS
1.06%

Original NVD Description

A vulnerability has been identified in SIMATIC CP 343-1 (incl. SIPLUS variants) (All versions), SIMATIC CP 343-1 Advanced (incl. SIPLUS variants) (All versions), SIMATIC CP 343-1 ERPC (All versions), SIMATIC CP 343-1 Lean (incl. SIPLUS variants) (All versions), SIMATIC CP 443-1 (All versions < V3.3), SIMATIC CP 443-1 (All versions < V3.3), SIMATIC CP 443-1 Advanced (All versions < V3.3), SIPLUS NET CP 443-1 (All versions < V3.3), SIPLUS NET CP 443-1 Advanced (All versions < V3.3). Sending a specially crafted packet to port 102/tcp of an affected device could cause a denial of service condition. A restart is needed to restore normal operations.