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10/07/2026 9:18 pm
TL;DR: MSPs are increasingly targeted because privileged access to customer environments turns a single compromise into downstream exposure across multiple organisations, according to SentinelOne. The practical lesson is that trust boundaries, offboarding, and zero-trust segmentation matter more than perimeter defence when service-provider access becomes the attack path.
NHIMG editorial — based on content published by SentinelOne: MSPs as supply chain targets and the defenses they need
Questions worth separating out
Q: How should security teams reduce risk from MSP access across customer environments?
A: Treat MSP access as privileged third-party identity, not ordinary vendor support.
Q: Why do MSPs create a larger lateral movement risk than direct attacks on one customer?
A: Because MSPs hold trusted administrative access across many tenants, a single compromise can bypass separate customer perimeters.
Q: What do organisations get wrong about offboarding MSP and vendor access?
A: They often remove accounts only after a contract ends, while leaving shared passwords, unused tools, and legacy connections in place.
Practitioner guidance
- Harden every MSP remote access path Require app-based MFA, aggressive patch SLAs, and continuous vulnerability scanning on VPNs, RDP gateways, and remote management tools that can reach customer environments.
- Map provider privilege to customer blast radius Document which MSP identities can reach which customer assets, then reduce standing access to the smallest possible scope and segment high-risk administrative functions.
- Remove stale and shared provider accounts Audit obsolete accounts, shared passwords, unused RMM instances, and orphaned tools during every offboarding cycle so dormant access does not persist across tenants.
What's in the full article
SentinelOne's full article covers the operational detail this post intentionally leaves for the source:
- Specific hardening steps for VPN, RDP, and remote monitoring tools used by MSPs
- Practical guidance on app-based MFA rollout and password hygiene across provider workflows
- Backup and recovery considerations for double extortion scenarios that include data theft
- Operational offboarding checks for deleting obsolete accounts, shared passwords, and unused tools
👉 Read SentinelOne’s analysis of MSP supply chain risk and defensive controls →
MSPs as a supply chain risk: are your controls keeping up?
Explore further
10/07/2026 9:40 pm
MSP trust is a shared identity problem, not just a service delivery problem. The article shows that providers often operate as privileged intermediaries across many environments, which means compromise can propagate through trusted access rather than through a classic perimeter breach. That makes lifecycle control, segmentation, and administrative accountability central to supply chain defence. Practitioners should govern MSP access as a first-class identity risk.
A question worth separating out:
Q: Who is accountable when an MSP breach affects downstream customers?
A: Accountability is shared, but responsibility for access governance sits with both the provider and the customer. Customers must verify that the provider’s controls match the risk of the access granted, while MSPs must enforce lifecycle cleanup, segmentation, and monitoring. Frameworks such as NIST CSF and NIST SP 800-53 help formalise that accountability.
👉 Read our full editorial: MSPs as supply chain targets: what security teams must harden
