CVE-2016-8562
Published: March 3, 2022
Official Description
An improper privilege management vulnerability exists within the Siemens SIMATIC Communication Processor (CP) that allows a privileged attacker to remotely cause a denial of service.
CISA KEV Advisory
Siemens SIMATIC CP 1543-1 Improper Privilege Management Vulnerability
An improper privilege management vulnerability exists within the Siemens SIMATIC Communication Processor (CP) that allows a privileged attacker to remotely cause a denial of service.
Apply updates per vendor instructions.
Risk Analysis
This improper privilege management vulnerability in Siemens SIMATIC Communication Processor (CP) allows a privileged attacker to remotely cause a denial of service. While it requires a privileged attacker, its high severity and confirmed exploitation in the wild make it a concern for industrial control systems. The EPSS score of 0.14581 indicates a notable likelihood of exploitation.
This vulnerability is actively exploited in the wild and is listed in CISA's KEV catalog. It allows a privileged attacker to remotely cause a denial of service.
Apply the necessary security updates for Siemens SIMATIC Communication Processor (CP). Implement network segmentation and strict access controls to protect industrial control systems.
Technical Analysis
CVE-2016-8562 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2016-8562 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Exploit & PoC Resources
All References (1)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2016-8562 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1