Why EDR alone is not enough
EDR is excellent technology on the endpoint, but it has two structural limits: it sees the endpoint, not the identity, cloud and network where half of today's attacks play out; and it produces alerts that someone has to interpret and handle 24·7. EDR is not the problem: the problem is thinking it is enough. Without analysts operating it and without coverage of the other domains, it stays a source of unhandled signals.
The thesis
EDR has raised the bar enormously on the endpoint, and it is right to have it. But “we have EDR” does not equal “we are covered”: two limits always remain, and neither depends on the quality of the product.
The cost of thinking it is enough
First limit: EDR sees the endpoint. Token and session theft, OAuth abuse, BEC on cloud mailboxes, movement on identities: these often do not pass through the endpoint, and there EDR is blind. Second limit: EDR produces alerts, not decisions. Without someone handling them 24·7, alerts pile up exactly when action is needed.
What MDR provides
The MDR operates the EDR and extends coverage to identity (ITDR), cloud and network, with analysts 24·7 who turn signals into containment. It is the difference between having the tool and having the capability.
When it really matters (and when less is enough)
If you have an in-house 24·7 team operating the EDR and dedicated solutions for identity and network, EDR is a solid part of your stack. If that outpost is missing, EDR alone is a risk dressed up as a solution: there, MDR is needed. For the full technical picture see what is an EDR.
EDR alone vs MDR (EDR + identity/network + analysts)
| EDR alone | MDR | |
|---|---|---|
| Coverage | Endpoint | Endpoint + identity + cloud + network |
| Identity / sessions | Blind spot | ITDR, post-auth anomaly detection |
| Alert handling | On you | Analysts 24·7 who act |
| Outcome | Signals | Closed incidents |
In Operation Storming Tide the technical signals were there: the difference was made by who interpreted them and contained the attack. An EDR without analysts acting 24·7 stays a source of unhandled alerts.
Read the analysis →Frequently asked.
Doesn't EDR detect everything on the endpoint?
It detects a lot, but today many attacks do not touch the endpoint: session and token theft, OAuth abuse, BEC via legitimate APIs, movement on identity and cloud. EDR is blind there; you need ITDR and network detection.
So is EDR useless?
No, it is a necessary baseline. The point is not to confuse it with a complete operational capability: EDR is a tool, the MDR is the service that operates it 24·7 and extends coverage to the other domains. See also MDR vs EDR vs XDR.
What happens to EDR alerts at night?
Without a 24·7 outpost, they stay in a queue. Most serious attacks mature outside office hours: an unhandled alert at 3 a.m. stops nothing. That is the gap MDR fills.
When can EDR be enough?
If you have a 24·7 security team operating it and other solutions for identity and network, EDR is a solid building block. If that team is missing, EDR alone is false security.
From theory to a real operation.
What you read here, Fortgale runs every day with a European SOC 24·7·365: 287 tools and actors profiled, <30 min median containment. Explore the service: Fortgale MDR service.
Related resources: What is an EDR · MDR vs EDR vs XDR · What is MDR
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