As the digital enterprise evolves, so too must the strategies used to secure it. In 2025, two converging forces are reshaping how organizations think about access security: the growing risks and operational costs associated with legacy VPNs, and the accelerating adoption of cloud-delivered Security Service Edge (SSE) solutions built on Zero Trust principles.
Data from two extensive industry reports, The 2025 VPN Exposure Report and The 2025 SSE Adoption Report, make one thing clear: traditional VPNs are no longer fit for securing modern, distributed workforces. In their place, Zero Trust Network Access (ZTNA) has emerged as the logical first step toward a comprehensive SSE and SASE strategy.
This article explores the drivers behind this seismic shift, the pain points forcing change, and how organizations are modernizing access security by embracing ZTNA and SSE as the foundation for a Zero Trust future.
The VPN Era Is Ending—And Not a Moment Too Soon
Breaches and Vulnerabilities Are Now the Rule, Not the Exception
Once seen as a cornerstone of remote access, VPNs are now one of the weakest links in enterprise cybersecurity. Nearly half of all organizations (48%) have experienced a VPN-related cyberattack, with many falling victim to credential theft, zero-day exploits, and ransomware enabled by VPN misconfigurations or over-privileged access (2025 VPN Exposure Report).
High-profile breaches like the February 2025 compromise of Ivanti’s Connect Secure VPN via a zero-day exploit (CVE-2025-0282) have highlighted just how dangerous it is to rely on aging VPN infrastructures.
Worse yet, attackers continue to favor VPNs as they provide wide access to internal networks, making lateral movement trivial once initial access is gained.
Fragmentation and Complexity Have Reached a Breaking Point
Security leaders aren’t just worried about breaches; they’re overwhelmed by the operational burden VPNs impose. A staggering 72% of organizations use between 2 and 5 different VPN services, and 67% operate at least three VPN gateways globally (2025 VPN Exposure Report).
This fragmented architecture:
- Increases the attack surface
- Complicates policy enforcement
- And creates IT overhead that stifles innovation.
Users Have Had Enough
The security concerns are mirrored by user frustration. A massive 83% of users are dissatisfied with their VPN experience, citing:
- Slow connections (31%)
- Cumbersome authentication (24%)
- Frequent disconnections (19%)
Inconsistent performance across devices and locations not only drags down productivity but also encourages employees to seek risky workarounds. In short, VPNs are failing both security teams and the end users they’re supposed to enable.
Enter Zero Trust: Replacing VPNs with Identity-Centric Access
ZTNA: The Logical First Step in the Zero Trust Journey
Zero Trust Network Access (ZTNA) is gaining significant traction, with 79% of organizations planning to adopt ZTNA within the next 24 months, according to the 2025 VPN Exposure Report. Notably, 83% believe ZTNA must fully replace VPN, not merely supplement it.
ZTNA differs from VPNs in several crucial ways:
- Least-privilege access: Instead of network-wide access, users are granted application-specific access based on identity, device health, and contextual factors
- Microsegmentation: Lateral movement is prevented by isolating access to individual apps or services
- Cloud-first architecture: ZTNA doesn’t require backhauling traffic through centralized VPN concentrators, reducing latency and improving scalability
Enhanced Security, Simpler Operations, and Better UX
The benefits of ZTNA adoption align directly with the core challenges organizations are facing:
- 73% of security leaders cite enhanced security posture as the #1 driver for switching to ZTNA
- 68% prioritize simplified infrastructure management
- 57% want a better user experience
- 53% seek seamless integration with cloud services
By decoupling access from the network layer and focusing on user and application identities, ZTNA represents a future-ready model for secure access.
SSE: The Strategic Framework to Scale Zero Trust
SSE Adoption Is Surging
According to the 2025 SSE Adoption Report, 79% of organizations plan to implement SSE within 24 months, with nearly half of them already in active deployment phases.
Key drivers include:
- Zero Trust as a strategic priority (46% start SSE with ZTNA)
- Desire to eliminate legacy appliances like VPN concentrators, SSL inspection boxes, and DDoS mitigation tools
- Need for consolidated, simplified management via a unified platform
SSE also aligns with larger Secure Access Service Edge (SASE) strategies by combining security and networking into a seamless cloud-based service.
Replacing VPNs Is Now a Top SSE Use Case
62% of organizations explicitly want SSE to eliminate VPN concentrators, making it the #1 driver for SSE adoption. The architectural advantages are compelling:
- Cloud-scale performance without centralized bottlenecks
- Granular visibility and control over user, app, and device activity
- Stronger compliance and audit readiness through unified policies and logs
Legacy appliances are being phased out, and SSE is stepping in to fill the gap with agility, visibility, and advanced threat protection built into its fabric.
ZTNA + SSE: The Blueprint for a Zero Trust Future
ZTNA is not a standalone solution. According to the SSE Adoption Report, 87% of organizations believe ZTNA must be part of a larger SSE platform, which also integrates SWG, CASB, and DLP functionality for end-to-end access security.
Phased Deployment: Start Where Risk Is Highest
Both reports emphasize a phased approach to Zero Trust and SSE deployment. Most organizations begin by:
- Securing remote/hybrid access (top priority for 35% of respondents)
- Enabling third-party access (15%)
- Integrating branch office connectivity and compliance requirements
ZTNA is often the first domino to fall. Once in place, teams can expand coverage to additional use cases like cloud security, in-office Zero Trust enforcement, and third-party risk management.
Confidence Rises When SSE Is in Place
Security teams currently rate their confidence in VPN segmentation at just 4.1 out of 10. In contrast, SSE provides continuous risk monitoring, adaptive policy enforcement, and full visibility into user and application activity, which dramatically improves confidence levels.
Rather than layering more tools on legacy models, SSE consolidates them—enabling smarter, more consistent policy enforcement.
Challenges to Overcome (and How to Tackle Them)
The Human Element: Organizational Buy-In
The biggest barrier to SSE adoption isn’t budget—it’s internal alignment. 33% of organizations cite cross-team buy-in as the #1 blocker, followed by concerns around organizational disruption (29%).
Success depends on aligning IT, security, and networking stakeholders early, educating business leaders on ROI, and emphasizing the long-term value of moving away from VPN-centric models.
Deployment Complexity and Support
31% worry SSE might be too complex to deploy at scale, but the reality is that most vendors now offer guided implementations, managed services, and real-time observability via integrated Digital Experience Monitoring (DEM). 93% of IT leaders now consider DEM critical to a successful SSE deployment.
Cost Concerns Are Giving Way to Strategic Investment
Although 21% cite SSE cost as a barrier, the majority of organizations are either maintaining or increasing their security budgets in 2025. Investing in SSE and ZTNA reduces long-term costs by:
- Minimizing appliance sprawl
- Lowering breach remediation risk
- Simplifying compliance
A unified, cloud-native access model pays dividends in reduced complexity and operational efficiency.
The Takeaway: Zero Trust Starts with Letting Go of VPNs
The writing is on the wall: VPNs are no longer a viable solution for modern secure access.
ZTNA offers a future-proof approach rooted in identity, context, and least-privilege principles—laying the foundation for full SSE and eventually SASE adoption. Organizations that embrace this shift will benefit from enhanced security, better performance, simplified operations, and stronger compliance.
Final Thought
2025 marks the beginning of the end for VPNs. Forward-thinking organizations are leading with ZTNA, scaling with SSE, and building toward SASE. By modernizing remote access around Zero Trust principles, they’re not just reacting to threats—they’re future-proofing their businesses.
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