Is CVE-2017-12420 actively exploited?

No active exploitation of CVE-2017-12420 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2017-12420 be exploited remotely?

Yes. CVE-2017-12420 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2017-12420?

CVE-2017-12420 has a CVSS score of 8.8 (HIGH).

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HIGH

CVE-2017-12420

CWE-119Published: August 18, 2017· Updated: Jun 17, 2026

8.8

CVSS v3.1

Official Description

Heap-based buffer overflow in the SMB implementation in NetApp Clustered Data ONTAP before 8.3.2P8 and 9.0 before P2 allows remote authenticated users to cause a denial of service or execute arbitrary code.

NVD Source

Technical Analysis

CVE-2017-12420 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 8.8.

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