Topic starter
21/08/2026 4:43 pm
TL;DR: Legacy SASE is failing in five ways because network enforcement cannot see browser-level intent, unmanaged devices, or shadow AI interactions, according to Island. The practical issue is not proxy tuning but shifting controls to the endpoint and browser, where modern work now happens.
Editorial analysis by NHI Mgmt Group, based on content published by Island: “Five ways your current SASE is failing you right now”.
Key questions
A: When security stops at the network layer, teams can block destinations but not govern what users do once a page loads.
Q: Why do browser-based SaaS and AI workflows expose legacy SASE gaps?
A: They move the security decision point to the browser, where the user action happens before traffic becomes just another packet flow.
Q: How can security teams tell if SSL inspection is no longer giving real coverage?
A: Look for growing exception lists, widespread bypasses, and business workflows that fail unless inspection is skipped.
Practitioner guidance
- Map browser-enforced policy into your access architecture Define which decisions must be made at the browser layer rather than in the network path, especially for SaaS, AI, and data upload workflows.
- Inventory shadow AI interactions by user workflow Track where employees upload files, paste content, or exchange data with unsanctioned AI apps so controls can target the actual interaction points.
- Measure SSL inspection exceptions as governance debt Review how much traffic is bypassing decryption, why it is bypassed, and which business workflows now depend on those exceptions.
Bottom line: Legacy SASE breaks down when it is forced to govern browser interactions using packet-level controls that cannot see intent or file handling.
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21/08/2026 5:03 pm
Browser enforcement is becoming part of access governance, not just security tooling. Once work happens inside SaaS and AI interfaces, the control question is no longer only how traffic is routed. It is who can do what inside the browser, on which device, and with what data handling rules. That pushes browser policy into the same governance conversation as identity, session control, and data protection.
A question worth separating out:
Q: What should organisations do when unmanaged devices cannot support legacy SASE controls?
A: They should move the policy decision to a place the device cannot evade, such as the browser or endpoint interaction layer. If control depends on installing and steering a stack that the organisation does not own, enforcement will remain inconsistent and access governance will degrade.
👉 Read our full editorial: Browser-enforced policy exposes why legacy SASE is failing