Is CVE-2021-21100 actively exploited?

No active exploitation of CVE-2021-21100 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-21100 be exploited remotely?

No. CVE-2021-21100 requires local access to exploit.

What is the CVSS score of CVE-2021-21100?

CVE-2021-21100 has a CVSS score of 7.8 (HIGH).

HOME VULNERABILITIESCVE-2021-21100

HIGH

CVE-2021-21100

CWE-379Published: April 15, 2021· Updated: Jun 17, 2026

7.8

CVSS v3.1

Official Description

Adobe Digital Editions version 4.5.11.187245 (and earlier) is affected by a Privilege Escalation vulnerability during installation. An unauthenticated attacker could leverage this vulnerability to achieve arbitrary file system write in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

NVD Source

Technical Analysis

CVE-2021-21100 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

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.