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CVE-2025-13926: Critical Vulnerability in Contemporary Controls BASC 20T

A critical vulnerability in Contemporary Controls BASC 20T allows attackers to forge packets using network-snooped data. Immediate patching is necessary to mitigate potential exploitation.

CRITICALCVSS 9.3 · Published April 9, 2026

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CVE-2025-13926 is a critical vulnerability affecting Contemporary Controls BASC 20T. This vulnerability allows an attacker to use data obtained by sniffing the network traffic to forge packets in order to make arbitrary requests to the product. With a CVSS score of 9.3, it is crucial for organizations to recognize the severity of this vulnerability and take necessary actions to mitigate risks.

The vulnerability poses a significant risk to organizations, particularly those utilizing the BASC 20T in their operational technology environments. Attackers may leverage this vulnerability to gain unauthorized access and manipulate system operations, leading to potential disruptions and data integrity issues.

Currently, the status of this vulnerability is awaiting analysis, with no known exploits reported at this time. Nevertheless, organizations should prioritize patching immediately to safeguard against potential attacks.

Given the nature of this vulnerability, organizations should prepare to implement mitigation strategies as soon as updates become available.

In conclusion, CVE-2025-13926 represents a substantial threat to the security of systems utilizing Contemporary Controls BASC 20T. Immediate action is required to address this vulnerability.

Vulnerability Details

The vulnerability is classified under CWE-807, which highlights the risks associated with unauthorized packet forging. The vulnerability was published on April 9, 2026, and it affects systems with a CVSS score of 9.3, indicating a critical severity level. The attack vector is network-based, requiring low complexity and no privileges or user interaction.

Technical Analysis

The root cause of this vulnerability lies in the ability of an attacker to intercept network traffic and manipulate it for malicious purposes. The attack complexity is assessed as low, and no user interaction is required for exploitation. The confidentiality, integrity, and availability impacts are all rated as high, indicating the potential for significant damage to affected systems.

Risk & Impact Analysis

Risk to organizations includes unauthorized access and manipulation of critical system operations. The blast radius is considerable, as compromised systems could lead to widespread operational disruptions. Organizations must evaluate the urgency of patching based on the critical CVSS score and the potential for exploitation.

Exploitation Status

Signal

Status

Known Exploit

No

Public PoC

No

Actively Exploited

No

Ransomware Use

No

Affected Versions

All versions prior to vendor patch are affected, although specific version details are currently unavailable.

Mitigation & Remediation

Organizations should prioritize patching immediately upon the release of updates from the vendor. For additional security, consider implementing network segmentation and monitoring tools to detect suspicious activities. Continuous assessment of network traffic and configurations will further enhance security posture. For detailed guidance, organizations can refer to our penetration testing services to evaluate their security measures.

Detection Guidance

Monitor network logs for unusual traffic patterns and unauthorized access attempts. Behavioral anomalies may indicate attempts to exploit this vulnerability. Additionally, maintaining updated signatures for intrusion detection systems will assist in identifying potential threats.

AppSecure Threat Intelligence Insight

The emergence of CVE-2025-13926 highlights the ongoing challenges in securing networked industrial control systems. As organizations become increasingly reliant on interconnected devices, vulnerabilities exposing them to network-based attacks will continue to rise. Security teams must remain vigilant and proactive in their defense strategies. For more insights on vulnerability trends, organizations can explore our 2025 vulnerability exposure severity trends and consider implementing comprehensive security assessments through our penetration testing methodology guide. Additionally, teams should familiarize themselves with best practices outlined in our vulnerability management program design article.

Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.

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