Is CVE-2020-36855 actively exploited?

No active exploitation of CVE-2020-36855 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2020-36855 be exploited remotely?

No. CVE-2020-36855 requires local access to exploit.

What is the CVSS score of CVE-2020-36855?

CVE-2020-36855 has a CVSS score of 5.5 (MEDIUM).

HOME VULNERABILITIESCVE-2020-36855

MEDIUM

CVE-2020-36855

CWE-119Published: October 21, 2025· Updated: Jun 17, 2026

5.5

CVSS v3.1

Official Description

A security vulnerability has been detected in DCMTK up to 3.6.5. The affected element is the function parseQuota of the component dcmqrscp. The manipulation of the argument StorageQuota leads to stack-based buffer overflow. Local access is required to approach this attack. The exploit has been disclosed publicly and may be used. Upgrading to version 3.6.6 is sufficient to fix this issue. The identifier of the patch is 0fef9f02e. It is recommended to upgrade the affected component.

NVD Source

Technical Analysis

CVE-2020-36855 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 availability disruption (denial of service), with a CVSS base score of 5.5.

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