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PatchSiren cyber security CVE debrief

CVE-2016-4523 Trihedral CVE debrief

CVE-2016-4523 is a denial-of-service vulnerability affecting Trihedral VTScada (formerly VTS). CISA lists it in the Known Exploited Vulnerabilities (KEV) catalog, which means it is treated as a known exploited issue and should be prioritized for remediation. The supplied corpus does not include a CVSS score or deeper technical root-cause details, so defenders should rely on the official CVE/CISA/NVD records and vendor update guidance.

Vendor
Trihedral
Product
VTScada (formerly VTS)
CVSS
HIGH 7.5
CISA KEV
Listed
Original CVE published
2022-04-15
Original CVE updated
2022-04-15
Advisory published
2022-04-15
Advisory updated
2022-04-15

Who should care

Organizations that operate or support Trihedral VTScada (formerly VTS), especially teams responsible for industrial control, monitoring, or operations technology environments. Security and operations teams should also care because the vulnerability is in CISA’s KEV catalog, indicating active risk.

Technical summary

The official records describe CVE-2016-4523 as a denial-of-service vulnerability in Trihedral VTScada (formerly VTS). The CISA KEV entry provides the remediation directive to apply updates per vendor instructions and includes a due date for action. The supplied source set does not include a CVSS score, exploit mechanics, or attack preconditions, so the safest evidence-based summary is that affected deployments should be updated and verified promptly.

Defensive priority

High

Recommended defensive actions

  • Inventory all deployments of Trihedral VTScada (formerly VTS) across production, test, and remote-access environments.
  • Apply vendor updates per the official guidance referenced by CISA KEV.
  • Verify remediation by confirming version status on all affected systems and documenting completion.
  • Prioritize externally reachable or operationally critical instances for immediate review.
  • Monitor for service disruption and validate backup, recovery, and failover procedures for the affected environment.

Evidence notes

The debrief is based on the supplied official links and KEV feed item only. CISA’s KEV metadata names the vulnerability as a Trihedral VTScada (formerly VTS) denial-of-service issue, lists dateAdded as 2022-04-15, dueDate as 2022-05-06, and states the required action is to apply updates per vendor instructions. The supplied corpus does not provide a CVSS score or additional technical detail.

Sources and references

Verified primary and authoritative sources

  • CVE-2016-4523 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2016-4523

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2016-4523 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2016-4523

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

  • CISA Known Exploited Vulnerabilities catalog

    Publisher, destination, and source semantics verified

    URL: https://www.cisa.gov/known-exploited-vulnerabilities-catalog

    Cybersecurity and Infrastructure Security Agency - Official CISA catalog of vulnerabilities known to be exploited in the wild.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

    cisa_kev

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.