CVE-2021-26726 Explained : Impact and Mitigation

A remote code execution vulnerability has been discovered in Valmet DNA service before Collection 2021, allowing attackers to execute commands with SYSTEM privileges.

Understanding CVE-2021-26726

This vulnerability affects Valmet DNA versions from Collection 2012 until Collection 2021.

What is CVE-2021-26726?

CVE-2021-26726 is a remote code execution vulnerability in Valmet DNA service listening on TCP port 1517.

The Impact of CVE-2021-26726

The vulnerability has a CVSS base score of 8.8, indicating a high severity level, with high impacts on confidentiality, integrity, and availability. It can be exploited by attackers with adjacent network access.

Technical Details of CVE-2021-26726

The vulnerability is categorized with several problem types, including CWE-305 Authentication Bypass, CWE-209 Information Exposure, CWE-272 Least Privilege Violation, and CWE-78 OS Command Injection.

Vulnerability Description

The flaw allows threat actors to execute commands with SYSTEM privileges, posing a significant risk to affected systems.

Affected Systems and Versions

Valmet DNA versions from Collection 2012 to Collection 2021 are impacted by this vulnerability.

Exploitation Mechanism

Attackers can exploit this vulnerability over TCP port 1517 with low attack complexity and no privileges required.

Mitigation and Prevention

To address CVE-2021-26726, users are advised to take immediate action and implement long-term security practices.

Immediate Steps to Take

Utilize Valmet DNA Firewall feature to restrict access to TCP port 1517.

Long-Term Security Practices

Upgrade to Valmet DNA version Collection 2021 to eliminate the vulnerability.

Patching and Updates

Regularly apply security patches and updates provided by Valmet to protect systems from potential threats.