Users, devices, applications, and data no longer sit behind one clean network boundary. Hybrid work, SaaS adoption, cloud workloads, and distributed branches have changed where access happens. For IT and security leaders, Secure Access Service Edge (SASE) and Zero Trust provide a framework for securing access across users, devices, applications, and locations.
Many teams evaluate SASE and Zero Trust together because they address different parts of the same access challenge. SASE delivers networking and security controls through a cloud-based framework, while Zero Trust defines how access should be verified, limited, and monitored. Together, they support an operating model for secure access rather than a one-time product deployment.
What SASE and Zero Trust Are and How They Work Together
Secure Access Service Edge (SASE) is a cloud-delivered architecture for applying networking and security controls across distributed environments. It typically includes capabilities such as:
- SD-WAN: Software-defined wide area networking, which securely routes traffic across corporate branches
- SWG: Secure Web gateways that filter malicious web traffic and block internet threats
- CASB: Cloud access security brokers that monitor and protect data moving between users and cloud apps
- FWaaS: Firewall as a service, which scales network protections via the cloud without requiring local hardware
- ZTNA: Zero Trust network access, which connects users securely to specific applications rather than the entire network.
Zero Trust security is an access philosophy. Its core premise is simple: organizations should never trust any user, device, or connection automatically.
SASE handles delivery—applying access controls closer to remote users, branches, and applications. Zero Trust handles decision-making—evaluating user identity, device health, and real-time risk to determine whether access should be granted.
Secure Access Depends on Identity, Device, and Context
Identity is often one of the first areas to assess when modernizing secure access. Microsoft’s 2025 Digital Defense Report found that 97% of identity attacks are password spray attacks—automated attempts to access accounts using common or leaked credentials at scale.
Teams should look beyond usernames, passwords, and network location. Access policies should account for who the user is, what device they are using, where the request is coming from, what application they need, and whether the session presents unusual risk.
A mature Zero Trust strategy relies on several key controls:
- Least privilege access restricts users to only the applications and systems required for their role.
- Multi-factor Authentication (MFA) adds an additional layer of identity verification as part of a broader access strategy.
- Device posture checks verify endpoint health, patching, and antivirus compliance before granting access.
- Continuous monitoring audits active sessions and automatically limits access when suspicious behavior is detected.
These controls can strengthen hybrid work security, protect cloud administration platforms, and secure third-party access. They also require security technology integration across identity management, endpoint protection, CASB platforms, firewalls, data loss prevention (DLP), and monitoring tools.
SASE Adoption Does Not Have to Happen All at Once
Many organizations start with the access paths or network segments that carry the most risk. Others begin with existing SD-WAN, branch, or cloud security priorities. The right sequence depends on current tools, user locations, cloud adoption, compliance needs, and staffing.
A vendor-sponsored 2025 SSE Adoption Report from Cybersecurity Insiders and HPE found that 59% of surveyed organizations planned to start SASE implementation with Security Service Edge (SSE) capabilities, while 41% planned to start with WAN edge services.
Visibility and Policy Consistency Make SASE and Zero Trust Work
Visibility determines whether access policies can be applied consistently. IT and security teams need to know which users, devices, applications, data flows, SaaS services, branch traffic, and cloud access patterns are in scope. Without that view, teams may struggle to enforce policies, review exceptions, or provide compliance evidence.
The Cybersecurity and Infrastructure Security Agency (CISA) Zero Trust Maturity Model frames Zero Trust across five pillars:
- Identity
- Device
- Network
- Data
- Applications and Workloads
Maintaining policy consistency across growing environments requires governance, automation, and integration between identity systems, endpoint platforms, and security operations tools.
Assessment Should Come Before Tool Decisions
Before selecting tools, IT leaders should map their current environment.
Start by asking:
- Which applications need protection?
- Which users, devices, and third parties need access?
- Which policies already exist?
- Where are identity, endpoint, network, cloud, and logging controls fragmented?
Common priorities include replacing broad VPN access with ZTNA, securing SaaS usage, and improving visibility across cloud environments.
Businesses should also assess existing investments across identity management, endpoint protection, firewalls, and monitoring tools while defining clear ownership for policy management, threat monitoring, and compliance reporting.
Organizations that work through those questions are better positioned to make tool decisions that hold up over time. A structured approach—moving from risk assessment to tool integration to ongoing management—helps teams close gaps without adding unnecessary complexity. Connection’s Strategic Security Evaluation can support that first step by helping organizations assess current risk and define roadmap priorities.
What This Means for Secure Access
SASE and Zero Trust are not one-time purchases. They require a clear view of access patterns, existing controls, policy ownership, and compliance needs. A phased approach can help organizations improve secure access without replacing every tool at once.
Connection can help teams assess where SASE and Zero Trust fit, integrate secure access controls with existing investments, and build a roadmap that is easier to manage over time. Explore Connection’s Cybersecurity Services to learn more or speak with a specialist.
