Arista Vulnerability Management Process
An organization's communications infrastructure and the tools that support it are critical to a business's ability to function. This importance also makes the infrastructure a high-value target for malicious actors seeking to gain entry deeper into the organization or to exfiltrate sensitive intellectual property. Arista Networks sees its role in security as a continuous process that begins at manufacturing and continues throughout the lifecycle of the product as vulnerabilities are detected, mitigated, and remediated.
This vulnerability management process encompasses several primary components: Secure Development Best Practices, Vulnerability Discovery, Mitigation and Remediation, and Vulnerability Communication. Product security must also be complemented through best practice configuration during the installation and operation of the infrastructure.
Arista Vulnerability Management Process
Secure Development Best Practices: A Secure-by-Design Philosophy
Both the design of new Arista features and the maintenance of our existing portfolio—including EOS®, DANZ Monitoring Fabric (DMF)™, CloudVision (CV)™, CloudVision CUE™, Enterprise Threat Management (ETM), Network Detection and Response (NDR), and VeloCloud—are driven by security as a foundational priority.
Arista ensures the inherent security of our products through a proactive, secure-by-design methodology. Rather than relying solely on post-development testing, our goal is to eliminate vulnerabilities before they ever see the light of day. We achieve this by combining memory-safe development with rigorous defensive programming, all reinforced by a culture of continuous vigilance.
- A Memory-Safe Technical Foundation: We eliminate entire classes of common vulnerabilities (such as buffer overflows and memory leaks) directly at the source code level:
- Memory-Safe Languages: The majority of our products are built using inherently memory-safe languages like Go, Java, and Python. For performance-critical components, we utilize a custom meta-language that combines the speed of C++ with the rigorous safety checks expected of a more secure language.
- Defensive Coding Practices: Our development pipeline mandates automated bounds checking on each operation, enforces safe initialization (defaulting pointers and data structures to safe, NULL values upon creation), and prevents resource leaks through safe memory operations, reference counting, and Valgrind analysis.
- Memory-Safe Languages: The majority of our products are built using inherently memory-safe languages like Go, Java, and Python. For performance-critical components, we utilize a custom meta-language that combines the speed of C++ with the rigorous safety checks expected of a more secure language.
- Resilient Execution & Architecture: Our software architecture is explicitly designed to prevent complex execution flaws and unauthorized data manipulation:
- Safe Concurrency: We eliminate race conditions and deadlocks by treating each program as a single thread of execution that communicates safely with other programs to share data, rather than sharing memory directly.
- Input Sanitization: To proactively neutralize the risk of malformed data injection, all internal and external APIs enforce strict, uncompromising input sanitization.
- Safe Concurrency: We eliminate race conditions and deadlocks by treating each program as a single thread of execution that communicates safely with other programs to share data, rather than sharing memory directly.
- Proactive Security Culture & Supply Chain Trust: The human element and the supply chain are critical to our secure development lifecycle:
- Continuous Threat Awareness: Our Product Security Incident Response Team (PSIRT) continuously monitors the threat landscape for emerging attack vectors, actively integrating these rising trends into company-wide engineering training.
- Empowered Engineers: Arista engineers receive ongoing, specialized training designed to help them architect inherently secure features and easily identify insecure design patterns during peer reviews.
- Strict Library Auditing: We proactively reduce supply chain risk by strictly limiting the usage of security-critical open-source software to highly audited, universally well-understood libraries.
- Continuous Threat Awareness: Our Product Security Incident Response Team (PSIRT) continuously monitors the threat landscape for emerging attack vectors, actively integrating these rising trends into company-wide engineering training.
Vulnerability Discovery - A Proactive and Prevention First Approach
Arista uses a multi-layered, proactive approach to detect emerging vulnerabilities across every major release. By combining advanced automation, artificial intelligence, and expert manual review, we ensure comprehensive coverage of our software supply chain and internal codebase.
- Automated Threat & Supply Chain Monitoring: Arista continuously scans for publicly disclosed vulnerabilities across our entire product portfolio using SBOM scanners, open-source review tools (nmap, static linters, dynamic memory analysis tools), and commercial scanners (Rapid7, Qualys, Tenable). This is heavily augmented by automated threat ingestion from the National Vulnerability Database (NVD) and close communication with third-party vendors.
- Frontier AI & Penetration Testing: Arista conducts traditional penetration testing utilizing both internal teams and external qualified third-party organizations for compliance, application, network, web, and red team testing. We act as an early adopter of advanced AI-driven security discovery. By leveraging frontier AI models (such as Anthropic and OpenAI), we utilize AI harnesses for advanced threat modeling, automated proof-of-concept testing, comprehensive assessment and continuous auditing to actively defend against autonomous zero-day vulnerabilities.
- Rigorous Manual Auditing & Architecture Review: Specialized PSIRT engineers and vetted outside consultants manually validate all automated scan results. These teams conduct ongoing, detailed reviews of design documentation, internal host configurations (boot loaders, kernels, networking stacks), and high-risk code—particularly functions that parse user input or handle external packets.
- Accurate Evaluation & Industry Alignment: When vulnerabilities are identified, Arista carefully evaluates them using CVSS v3.1/v4.0 scoring to reflect their actual impact in the context of Arista products. All security baselines are strictly aligned with industry standards, including official CIS Hardening Benchmarks and our living Arista EOS Hardening Guide.
Mitigation and Remediation: Flexible, Low-Impact Patching
When a security vulnerability is identified, traditional network OS upgrades often force disruptive system reboots and significant downtime. To give customers maximum flexibility and immediate protection, Arista provides a staged remediation strategy designed to secure environments rapidly while minimizing operational impact.
- Rapid Risk Reduction via Configuration Mitigation: As an immediate first line of defense, Arista prioritizes providing clear, highly effective configuration changes whenever possible to mitigate the risk of an active vulnerability. These documented workarounds allow customers to swiftly secure their environments—such as by altering access controls or temporarily disabling an affected service—blocking the attack vector while teams evaluate patch deployment strategies.
- Targeted Patching via Hotfixes: For many vulnerabilities, Arista can provide a targeted hotfix rather than requiring a full OS upgrade. Delivered as an extension, a hotfix installs directly onto a running system to patch the specific vulnerable component without forcing a system-wide reboot.
- Real-World Example: If a publicly disclosed CVE impacts the SSH Server, Arista can release a hotfix to resolve it. Upon installation, only the SSH service restarts—causing less than a second of service-specific downtime. All other switch services, routing protocols, and traffic forwarding remain completely unaffected.
- The Advantage: Hotfixes provide immediate remediation that persists across switch reboots. This allows our customers to secure the device instantly and defer a full OS upgrade to a regularly scheduled maintenance window.
- Real-World Example: If a publicly disclosed CVE impacts the SSH Server, Arista can release a hotfix to resolve it. Upon installation, only the SSH service restarts—causing less than a second of service-specific downtime. All other switch services, routing protocols, and traffic forwarding remain completely unaffected.
- Seamless OS Updates via Smart System Upgrade (SSU) For vulnerabilities that do require a complete OS update, Arista eliminates the friction of traditional upgrades using our Smart System Upgrade (SSU)—an advanced In-Service Software Upgrade (ISSU) capability built into Arista EOS. Learn more at EOS: Smart System Upgrade.
- How it works: SSU allows the switch to reload its entire operating system with less than one second of data-plane downtime.
- The Advantage: Because SSU performs the upgrade without resetting the forwarding ASIC, single-homed and active connections remain alive. This provides an ability to apply comprehensive OS-level remediation and load the newest, fully patched image without dropping critical traffic or triggering broader network topology recalculations.
- How it works: SSU allows the switch to reload its entire operating system with less than one second of data-plane downtime.
- Our Remediation Philosophy When it comes to engineering resource allocation, Arista operates under a strict mandate: securing our customers is our absolute highest priority. The development, testing, and delivery of fixes for security vulnerabilities will always take precedence over new product enhancements or feature upgrades. We are committed to ensuring our customers have the patches they need, as quickly as possible, without compromise.
Communication: Transparent Disclosure
To help our customers keep pace with the rapid rate of modern vulnerability discovery, Arista prioritizes transparent, flexible, and proactive communication. We provide the critical information required for effective risk management through a variety of delivery options and release schedules tailored to the urgency of the threat.
- Flexible Advisory Release Strategies: Arista utilizes two distinct timelines for releasing security advisories, ensuring that our communication matches the operational needs of our customers:
- Scheduled Grouped Releases (Predictable): To coordinate communications and streamline patching efforts, Arista publishes routine advisories on a predictable, regular release schedule. When a larger volume of advisories is scheduled, we consolidate them into a single bulk publication and issue a 1-week advance public notification. This courtesy notice allows organizations to strategize and allocate resources before the technical details are published.
- Time-Sensitive Releases (Immediate): For critical, externally disclosed, or actively exploited vulnerabilities, Arista bypasses the scheduled cycle. These advisories are published immediately as time-sensitive releases without advance notice, ensuring our customers have the information needed to protect an environment instantly.
- Scheduled Grouped Releases (Predictable): To coordinate communications and streamline patching efforts, Arista publishes routine advisories on a predictable, regular release schedule. When a larger volume of advisories is scheduled, we consolidate them into a single bulk publication and issue a 1-week advance public notification. This courtesy notice allows organizations to strategize and allocate resources before the technical details are published.
- Standardized, Actionable Content: When Arista publishes an advisory, our goal is to provide a complete risk management package rather than just a vulnerability notification.
- Comprehensive Solutions: Every advisory includes actionable remediation paths. While a full software image upgrade is always provided, we also strive to include recommended configuration mitigations and targeted software hotfixes depending on the vulnerability.
- MITRE CVE Tracking: Arista strictly follows industry best practices by assigning official CVEs via MITRE to all security issues. This ensures our vulnerabilities can be easily and accurately tracked across most internal security scanners, third-party advisories, and compliance management procedures.
- Comprehensive Solutions: Every advisory includes actionable remediation paths. While a full software image upgrade is always provided, we also strive to include recommended configuration mitigations and targeted software hotfixes depending on the vulnerability.
- Proactive Delivery & Automation: We offer multiple channels for vulnerability disclosure, allowing our customers to consume security data in the way that best fits individual operational workflows:
- Public Portal & Push Notifications: All security vulnerabilities and their associated solutions are documented publicly on the Arista Advisories and Notices page. Customers can also opt into proactive alerts via email updates and RSS feeds.
- Automated Evaluation via CloudVision AlertBase: For customers utilizing CloudVision, AlertBase automatically ingests updates about new security advisories and proactively evaluates the vulnerability status of all EOS devices managed by that instance. This speeds up the remediation process and transforms manual advisory reading into automated fleet auditing.
- Public Portal & Push Notifications: All security vulnerabilities and their associated solutions are documented publicly on the Arista Advisories and Notices page. Customers can also opt into proactive alerts via email updates and RSS feeds.
Summary
Arista goes to great lengths to ensure the ongoing security of its products and rapid mitigation of emerging threats, following industry best practices and leveraging close relationships with suppliers. The effectiveness of these robust processes is demonstrated by extremely limited exposure to common security issues as well as rapid and usually impact-free solutions for remediation. Arista customers following our recommended hardening steps can be confident that they have deployed the industry's leading secure networking solutions.