Denial-of-Service and Remote Code Execution Vulnerability in Siemens SIPROTEC 5 Relays
CVE-2021-33719
9.8CRITICAL
Key Information:
- Vendor
Siemens
- Status
- Vendor
- CVE Published:
- 14 September 2021
What is CVE-2021-33719?
A vulnerability exists in Siemens SIPROTEC 5 relays, specifically in the CPU variants CP050, CP100, and CP300, where specially crafted packets sent to port 4443/tcp can cause a Denial-of-Service condition. In some scenarios, this exploit may also enable remote code execution, potentially allowing an attacker to execute arbitrary commands on the affected devices. This poses significant risks to system integrity and availability, highlighting the urgent need for affected users to update to versions V8.80 or later.
Affected Version(s)
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