Is CVE-2020-6996 actively exploited?

No active exploitation of CVE-2020-6996 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2020-6996 be exploited remotely?

Yes. CVE-2020-6996 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2020-6996?

CVE-2020-6996 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2020-6996

CWE-121Published: April 15, 2020· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

Triangle MicroWorks DNP3 Outstation LibrariesDNP3 Outstation .NET Protocol components and DNP3 Outstation ANSI C source code libraries are affected:3.16.00 through 3.25.01. A specially crafted message may cause a stack-based buffer overflow. Authentication is not required to exploit this vulnerability.

NVD Source

Technical Analysis

CVE-2020-6996 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.