CVE-2021-37206

HIGH

SIPROTEC 5 < 8.80 - Unauthenticated DoS via Malformed Ethernet Packets

Title source: llm
STIX 2.1

Description

A vulnerability has been identified in SIPROTEC 5 relays with CPU variants CP050 (All versions < V8.80), SIPROTEC 5 relays with CPU variants CP100 (All versions < V8.80), SIPROTEC 5 relays with CPU variants CP300 (All versions < V8.80). Received webpackets are not properly processed. An unauthenticated remote attacker with access to any of the Ethernet interfaces could send specially crafted packets to force a restart of the target device.

References (1)

Core 1
Core References
Patch, Vendor Advisory x_refsource_misc
https://cert-portal.siemens.com/productcert/pdf/ssa-500748.pdf

Scores

CVSS v3 7.5
EPSS 0.0058
EPSS Percentile 69.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-20
Status published
Products (3)
siemens/siprotec_5_with_cpu_variant_cp050 < 8.80
siemens/siprotec_5_with_cpu_variant_cp100 < 8.80
siemens/siprotec_5_with_cpu_variant_cp300 < 8.80
Published Sep 14, 2021
Tracked Since Feb 18, 2026