Is CVE-2020-15787 actively exploited?

No active exploitation of CVE-2020-15787 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2020-15787 be exploited remotely?

Yes. CVE-2020-15787 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2020-15787?

CVE-2020-15787 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2020-15787

CWE-305Published: September 9, 2020· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

A vulnerability has been identified in SIMATIC HMI Unified Comfort Panels (All versions <= V16). Affected devices insufficiently validate authentication attempts as the information given can be truncated to match only a set number of characters versus the whole provided string. This could allow a remote attacker to discover user passwords and obtain access to the Sm@rt Server via a brute-force attack.

NVD Source

Technical Analysis

CVE-2020-15787 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.

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 9.8.