Is CVE-2020-5821 actively exploited?

No active exploitation of CVE-2020-5821 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2020-5821 be exploited remotely?

No. CVE-2020-5821 requires local access to exploit.

What is the CVSS score of CVE-2020-5821?

CVE-2020-5821 has a CVSS score of 7.8 (HIGH).

HOME VULNERABILITIESCVE-2020-5821

HIGH

CVE-2020-5821

CWE-427Published: February 11, 2020· Updated: Jun 17, 2026

7.8

CVSS v3.1

Official Description

Symantec Endpoint Protection (SEP) and Symantec Endpoint Protection Small Business Edition (SEP SBE), prior to 14.2 RU2 MP1 and prior to 14.2.5569.2100 respectively, may be susceptible to a DLL injection vulnerability, which is a type of issue whereby an individual attempts to execute their own code in place of legitimate code as a means to perform an exploit.

NVD Source

Technical Analysis

CVE-2020-5821 requires local access, meaning attackers must already have a foothold on the target system.

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 7.8.