Is CVE-2019-5135 actively exploited?

No active exploitation of CVE-2019-5135 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2019-5135 be exploited remotely?

Yes. CVE-2019-5135 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2019-5135?

CVE-2019-5135 has a CVSS score of 5.3 (MEDIUM).

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MEDIUM

CVE-2019-5135

CWE-327Published: March 11, 2020· Updated: Jun 17, 2026

5.3

CVSS v3.1

Official Description

An exploitable timing discrepancy vulnerability exists in the authentication functionality of the Web-Based Management (WBM) web application on WAGO PFC100/200 controllers. The WBM application makes use of the PHP crypt() function which can be exploited to disclose hashed user credentials. This affects WAGO PFC200 Firmware version 03.00.39(12) and version 03.01.07(13), and WAGO PFC100 Firmware version 03.00.39(12).

NVD Source

Technical Analysis

CVE-2019-5135 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.