If 56% of Your Peers Were Breached via VPN, It’s Time to Plan a ZTNA Transition
More than half of surveyed enterprises — 56% — reported at least one cyberattack that exploited VPN vulnerabilities in the past year, up from 45% the year before. With 91% of organizations saying VPNs weaken their security posture and 78% planning Zero Trust rollouts within 12 months, the industry is pivoting toward Zero Trust Network Access (ZTNA) as a deliberate replacement, not a cosmetic upgrade.
Where traditional VPNs still deliver measurable benefit
VPNs remain useful when remote access needs are tightly scoped: single-application access, small branch-to-branch links, or short-term contractor connections where cost and speed matter more than zero-friction segmentation. In those cases, a well-configured VPN with strong encryption (AES-256), enforced multi-factor authentication, current patches, and strict logging can limit exposure while teams plan a longer migration.
But that usefulness collapses quickly if conditions change: legacy protocols like PPTP or outdated OpenVPN builds, unmanaged endpoint clients, or providers that retain broad logs turn a stopgap into a liability almost immediately.
Concrete ways VPNs are failing enterprises now
Attackers are exploiting VPNs across multiple vectors: ransomware (42% of incidents reported), malware (35%), and DDoS (30%) top the list of threats observed against VPN infrastructure. The frequency of zero-day flaws in major VPN products has drawn emergency advisories from agencies such as CISA, showing the problem is systemic rather than isolated.
Operational weaknesses amplify technical bugs. DNS and IP leaks, misconfigured split tunneling, absence of kill switches, and insecure logging all produce persistent exposures — and they are precisely the behaviors Zero Trust aims to eliminate by default. Survey data reflects that reality: 62% of enterprises now view VPNs as incompatible with Zero Trust principles like least-privilege access and continuous verification.
Decision checkpoints for replacing VPNs with ZTNA
The trade-off is simple: ZTNA reduces broad network access and attack surface, but it requires application inventories, updated identity plumbing, and sometimes new vendor integrations. Use the table below to scan common signals and the recommended timing and actions.
| Signal / Condition | What it implies | Recommended action & timeframe |
|---|---|---|
| You had a VPN-related breach in past 12 months (56% of firms) | Immediate urgency; current VPN posture is exploitable | Begin emergency remediation and accelerate ZTNA replacement within 3–6 months |
| VPN uses legacy protocols or unmanaged clients | High technical debt; persistent attack surface | Patch or replace clients short-term; plan ZTNA migration in next 6–12 months |
| Regulatory or compliance pressure on access logs | VPN logging and retention policies create legal risk | Prioritize identity- and policy-driven access: target ZTNA pilot in 3–9 months |
| Limited budget or legacy app constraints | Cannot retire VPN immediately without breaking users | Adopt hybrid guardrails: segment VPN traffic, enforce MFA, set short sunset dates |
Enterprises that need immediate hardening can adopt ZTNA pilots — for example, vendors like Zscaler Private Access hide applications from the internet and apply least-privilege rules — while continuing limited VPN use for legacy dependencies. But hybrids must be treated as temporary: mixing VPN and ZTNA without strict controls often preserves the original VPN weaknesses.
Operational checkpoints before you flip the switch
Start with an application inventory and a mapping of which users truly need network-level access versus application-level access; that inventory is the single most actionable gating item for a phased ZTNA rollout. Require MFA tied to device posture checks, instrument continuous monitoring on both sides of the migration, and set contractual SLAs with any ZTNA vendor for visibility and incident response.
Governance matters: schedule audit milestones (30, 90, 180 days), set a clear retirement date for VPN infrastructure where feasible, and track measurable signals — a drop in exposed services, reduced lateral-movement alerts, and lower incident counts. The next practical checkpoint to watch is whether your teams can fully retire VPN endpoints without causing operational outages; if not, extend the hybrid phase but tighten compensating controls.
Short Q&A
Q: Does ZTNA mean no VPN at all? A: Not immediately. ZTNA replaces broad network access with per-application, identity-driven access; many organizations run pilots first and keep VPNs only for specific legacy use cases.
Q: What is the first technical step? A: Inventory applications and integrate strong identity (MFA + device posture). Without identity control, ZTNA cannot enforce least-privilege effectively.
Q: What is the clearest warning sign you’re moving too slowly? A: Any new VPN-related compromise or repeated exploit advisories from regulators such as CISA — those are direct signals to accelerate replacement timelines.
