CVE-2016-4523
Published: April 15, 2022
Official Description
The WAP interface in Trihedral VTScada (formerly VTS) allows remote attackers to cause a denial-of-service (DoS).
CISA KEV Advisory
Trihedral VTScada (formerly VTS) Denial-of-Service Vulnerability
The WAP interface in Trihedral VTScada (formerly VTS) allows remote attackers to cause a denial-of-service (DoS).
Apply updates per vendor instructions.
Risk Analysis
This vulnerability in Trihedral VTScada's WAP interface allows a remote attacker to disrupt system availability by causing a denial-of-service. With an EPSS score of 0.66951, there is a high likelihood of exploitation, and its inclusion in CISA's KEV confirms active exploitation.
Active exploitation of this vulnerability has been observed in the wild. The nature of the flaw suggests it is remotely exploitable.
Review and secure the WAP interface configuration in Trihedral VTScada. Apply any available patches or updates from the vendor to address this denial-of-service vulnerability.
Technical Analysis
CVE-2016-4523 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-2016-4523 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-2016-4523 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