Unauthorized Data Access and Configuration Vulnerabilities Discovered in Arista EOS (CVE-2025-1259, CVE-2025-1260)

Published: March 3, 2025
Severity: High (CVSS 8.0)
Impacted Product: Arista Networks Extensible Operating System (EOS)

Summary

Arista Networks has issued a security advisory addressing two high-severity vulnerabilities impacting its Extensible Operating System (EOS), which powers many of the organization's network switching solutions.

These newly disclosed vulnerabilities allow attackers to:

• Gain unauthorized access to sensitive data.
• Apply unauthorized configuration changes to affected devices.

With a CVSS severity of 8.0, these vulnerabilities pose a serious threat to network integrity, data privacy, and operational stability—especially in high-traffic, production environments.

Vulnerability Details

CVE-2025-1259: Unauthorized Data Access

This vulnerability may allow users to retrieve sensitive data that should otherwise remain inaccessible. Successful exploitation could expose critical device information, user data, or operational insights that could aid further attacks.

CVE-2025-1260: Unauthorized Configuration Changes

This flaw may enable unexpected configurations or operational changes to be applied to an affected switch. Attackers exploiting this vulnerability could modify device settings, disrupt network traffic, or weaken overall security posture.

What’s at Risk

Organizations running vulnerable versions of Arista EOS face potential impacts such as:

• Exposure of sensitive system data.
• Unauthorized network reconfiguration.
• Service disruptions or degraded performance.
• Compromised network security and reliability.

Mitigation Steps

Gradient Cyber strongly recommends the following actions:

1. Review Arista’s official security advisory for detailed technical guidance and patch information.
2. Apply the latest available updates to all impacted EOS devices immediately.
3. Audit device configurations to identify and correct unauthorized changes.
4. Monitor for unusual activity or unauthorized access attempts.
5. Enforce strict access controls and follow the principle of least privilege for administrative users.

Gradient Cyber’s Perspective

As critical infrastructure devices, switches running Arista EOS are central to network operations. When vulnerabilities like these emerge, the risk extends beyond individual devices to the entire connected environment. Fast, proactive patching and vigilant monitoring are essential to preventing unauthorized access and maintaining operational stability.

Gradient Cyber continues to monitor for exploitation activity and is available to support organizations assessing their exposure to these vulnerabilities.

Need Support?

Gradient Cyber offers proactive threat detection, vulnerability management, and incident response services to help secure your environment from emerging threats like these.

Contact our team to get started.