Is CVE-2020-27859 actively exploited?

No active exploitation of CVE-2020-27859 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2020-27859 be exploited remotely?

Yes. CVE-2020-27859 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2020-27859?

CVE-2020-27859 has a CVSS score of 7.5 (HIGH).

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HIGH

CVE-2020-27859

CWE-22Published: January 20, 2021· Updated: Jun 17, 2026

7.5

CVSS v3.1

Official Description

This vulnerability allows remote attackers to disclose sensitive information on affected installations of NEC ESMPRO Manager 6.42. Authentication is not required to exploit this vulnerability. The specific flaw exists within the GetEuaLogDownloadAction class. The issue results from the lack of proper validation of a user-supplied path prior to using it in file operations. An attacker can leverage this vulnerability to disclose information in the context of SYSTEM. Was ZDI-CAN-9607.

NVD Source

Technical Analysis

CVE-2020-27859 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), with a CVSS base score of 7.5.