CVE-2021-33720

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...

Published: Sep 14, 2021Updated: Nov 21, 2024 Sources: CVE List NVD csafCWE-120

7.5HIGH

Description

The latest update for SIPROTEC 5 relays fixes two vulnerabilities that could allow a remote attacker to cause a denial-of-service or potentially trigger a remote code execution under certain circumstances. Siemens has released an update for SIPROTEC 5 relays and recommends to update to the latest version.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:NPrivileges Required

None

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:NConfidentiality

None

I:NIntegrity

None

A:HAvailability

High

Open in CVSS calculator →

Weaknesses

CWE-120

Affected Products

Siemens

commercial·DEaka siemens ag

SIPROTEC 5 relays with CPU variants CP050

ICS / OT / IoT

SIPROTEC 5 relays with CPU variants CP100

ICS / OT / IoT

SIPROTEC 5 relays with CPU variants CP300

ICS / OT / IoT

siprotec 5 with cpu variant cp050

ICS / OT / IoT

siprotec 5 with cpu variant cp100

ICS / OT / IoT

siprotec 5 with cpu variant cp300

ICS / OT / IoT

Exploitability

Official Patch Available

Workaround Available

Is your org exposed to CVE-2021-33720?Request an assessment to establish which checks are appropriate for your systems. Check my exposure

Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

2 techniques

Initial Access

Privilege Escalation

View detailed technique mapping

References

https://cert-portal.siemens.com/productcert/csaf/ssa-847986.json

cert-portal.siemens.com

https://cert-portal.siemens.com/productcert/txt/ssa-847986.txt

cert-portal.siemens.com

https://cert-portal.siemens.com/productcert/pdf/ssa-847986.pdf

cert-portal.siemens.com

and 11 more references View all →

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2021-33720 and every CVE in our database. Create a free account — no credit card required.

Create Free Account

Plain-language analysis

Impact assessment and exploitation scenario in plain English

Attack graph visualization

Interactive attack path and kill chain mapping

Exploit details & PoC links

ExploitDB, Metasploit, GitHub PoCs with direct links

Nuclei scanner templates

Ready-to-use vulnerability scanner templates

Full remediation guide

Patch instructions, workarounds, and compliance impact

Interactive AI chat

Ask questions about this vulnerability in natural language

Related vulnerabilities

Semantically similar CVEs and attack patterns

REST API & MCP access

Integrate vulnerability data into your workflows