Is CVE-2020-12647 actively exploited?

No active exploitation of CVE-2020-12647 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2020-12647 be exploited remotely?

No. CVE-2020-12647 requires local access to exploit.

What is the CVSS score of CVE-2020-12647?

CVE-2020-12647 has a CVSS score of 8.8 (HIGH).

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HIGH

CVE-2020-12647

NVD-CWE-OtherPublished: May 21, 2020· Updated: Jun 17, 2026

8.8

CVSS v3.1

Official Description

Unisys ALGOL Compiler 58.1 before 58.1a.15, 59.1 before 59.1a.9, and 60.0 before 60.0a.5 can emit invalid code sequences under rare circumstances related to syntax. The resulting code could, for example, trigger a system fault or adversely affect confidentiality, integrity, and availability.

NVD Source

Technical Analysis

CVE-2020-12647 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 8.8.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.