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CVE-2016-8377 Fatek CVE debrief

CVE-2016-8377 was publicly disclosed on 2017-02-13 and affects Fatek Automation PLC WinProladder Version 3.11 Build 14701. According to the official NVD record, the issue is a stack-based buffer overflow that can be triggered when the application connects to a malicious server, creating an exploitable SEH overwrite condition that may allow remote code execution. NVD rates the issue HIGH with a CVSS 3.1 vector of AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H.

Vendor
Fatek
Product
Unknown
CVSS
HIGH 8
CISA KEV
Not listed in stored evidence
Original CVE published
2016-09-18
Original CVE updated
2025-06-05
Advisory published
2016-09-18
Advisory updated
2025-06-05

Who should care

Industrial control system and OT teams using Fatek WinProladder, especially engineering workstations or operators that may connect the software to external or untrusted servers. Security teams responsible for segmented ICS environments should treat this as a serious endpoint and network exposure risk.

Technical summary

NVD classifies the weakness as CWE-119 and lists the vulnerable component as cpe:2.3:o:fatek:plc_winproladder_firmware:3.11:build_14701. The vulnerability is described as a stack-based buffer overflow reached when WinProladder connects to a malicious server. The resulting stack corruption can overwrite SEH state and may lead to remote code execution. The published CVSS vector indicates network attackability, low attack complexity, required privileges, required user interaction, and high impact to confidentiality, integrity, and availability.

Defensive priority

High

Recommended defensive actions

  • Identify any systems running WinProladder Version 3.11 Build 14701 and treat them as exposed until validated otherwise.
  • Restrict the software to trusted, authenticated server endpoints only; block or tightly control outbound connections from engineering workstations.
  • Segment OT/ICS engineering assets from general-purpose networks and internet-reachable services.
  • Review the ICS-CERT advisory and NVD record for vendor guidance and compensate with local mitigations if patching is not immediately available.
  • Monitor affected hosts for unexpected outbound connection attempts or crashes during server connections.
  • If the affected version is no longer required, remove or replace it with a validated alternative after testing in a controlled environment.

Evidence notes

This debrief is based on the official NVD CVE record and the supplied NVD modified feed entry. The corpus states the affected product/version, the stack-based buffer overflow, the malicious-server trigger, the SEH overwrite condition, and the likely RCE outcome. The references list an ICS-CERT advisory, SecurityFocus BID 94938, and an Exploit-DB entry as corroborating third-party sources. No patch status or exploit details are asserted beyond what is present in the supplied corpus.

Sources and references

Verified primary and authoritative sources

  • CVE-2016-8377 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2016-8377

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

  • CVE-2016-8377 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2016-8377

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

Supplemental references

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.