Is CVE-2016-8377 actively exploited?

A proof-of-concept exploit is publicly available for CVE-2016-8377, but active exploitation has not been confirmed.

Can CVE-2016-8377 be exploited remotely?

Yes. CVE-2016-8377 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2016-8377?

CVE-2016-8377 has a CVSS score of 8.0 (HIGH).

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HIGHPOC

CVE-2016-8377

CWE-119Published: February 13, 2017· Updated: Jun 17, 2026

8.0

CVSS v3.1

Official Description

An issue was discovered in Fatek Automation PLC WinProladder Version 3.11 Build 14701. A stack-based buffer overflow vulnerability exists when the software application connects to a malicious server, resulting in a stack buffer overflow. This causes an exploitable Structured Exception Handler (SEH) overwrite condition that may allow remote code execution.

NVD Source

Technical Analysis

CVE-2016-8377 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.0.

A proof-of-concept (PoC) exploit exists for CVE-2016-8377. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.

From a weakness classification perspective (CWE-119): Buffer overflow vulnerabilities can lead to arbitrary code execution or denial of service by corrupting adjacent memory.