Consider access keys cached on a single Windows machine. Like most cached credentials, the key itself is automatically saved when the user logs in. Standard AWS behavior. No one misconfigured or violated any policies. But that one key, easily accessible to a minor league attacker, could have paved the way to approximately 98% of the entities in an enterprise’s cloud environment, or nearly every critical workload that a business depends on.
This real-world exposure was caught before attackers could take advantage of it. But the important thing is clear. The identity itself, and all the permissions it contains, is an attack vector.
The environment operates based on identity. Active Directory, cloud identity providers, service accounts, machine identities, AI agents – they all hold permissions across systems and trust boundaries. Once a single credential is stolen, the legitimate identity and all associated privileges are handed over to the attacker.
Despite this, most security programs still treat identity as something to be protected through perimeter controls, that is, authentication and access policies. But the real risk starts inside your front door. Once an attacker gains a foothold, identity helps the attack advance, cross boundaries, and reach critical assets. Because identity is not a boundary, but a highway that runs through every layer of the environment.
This article explains how cached credentials, excessive privileges, and forgotten role assignments turn into attack vectors across hybrid environments, and why tools designed to catch them continue to be lacking.
Attack vector pierces identity
The cached access keys in the first scenario are just one example of a larger phenomenon. Identity across hybrid environments
One Active Directory group membership that no one has reviewed gives an attacker on a retail endpoint a direct path to the corporate domain. The developer SSO role provisioned for cloud migration retains its privileges long after the project ends, giving anyone who compromises that identity a four-step route from developer access to operations administrator. What makes these real-world examples so dangerous is how they are tied together. Cached credentials on retail endpoints led to over-privileged roles in Active Directory and cloud workloads with attached management policies. The links in this type of identity exposure chain form a single attack path from the initial foothold to the critical asset.
How prevalent is this? Palo Alto found that identity weaknesses played a significant role in nearly 90% of incident response investigations in 2025. And that number is likely to grow even more given the proliferation of AI agents taking on enterprise workloads. SpyCloud’s 2026 Identity Breach Report reports non-human identity theft as one of the fastest growing categories in underground crime, with one-third of recovered non-human credentials tied to AI tools.
What if one of these non-human identities has administrator-level permissions? Consider a development team configuring an MCP server with high-level privileges so that an AI tool can work across systems. AI agents that use MCP servers inherit these permissions as their own identities. A vulnerability in an open source tool could easily allow an attacker to hand over the privileges held by the agent. From there, the path leads directly to cloud resources, databases, and production infrastructure. The credentials that make this possible are exactly the same types that are circulating in millions of criminal marketplaces.
Why tools continue to be scarce
Clearly, the threat of identity theft is not new. But the identity tools that most organizations still rely on were built to solve specific problems in a different era of threats.
The IGA platform manages the user lifecycle, including provisioning, deprovisioning, and access reviews. PAM solutions store privileged credentials and monitor sessions. Each of these tools works independently. However, none of them can map how identity exposures are cascaded across endpoints, Active Directory, and cloud environments into a single exploitable root.
This is why the rate of identity-based incidents continues to rise, even as security spending increases. According to the IBM X-Force 2026 Threat Intelligence Index, credential theft or misuse accounts for 32% of incidents, making it the second most common initial access vector. Today’s attackers don’t need to create malware or exploits; they just need to log in.
Most of these identity-based exposures are completely preventable. In fact, in Palo Alto, the team found that more than 90% of the breaches it investigated in 2025 were caused by breaches that could have been detected with existing tools. The organization had the tools and staff in place. However, a gap remained as there was no single tool that could provide visibility into how leaked personal information cascaded into attack vectors across the environment.
fill the gap
Until security programs can connect identity, privileges, and access controls to create a unified view of how attackers actually move, identity will continue to be one of the easiest ways to compromise critical assets.
All scenarios in this article follow the same structure. This means that any credentials, permissions, or role assignments that no single tool flags as risky create a traversable path from lower-level scaffolding to critical assets. Paths are only visible when identity, access policy, and environment context are mapped together.
Security programs that map these connections across hybrid environments can close identity-based attack paths before attackers can chain them. Programs that continue to treat identity as a boundary problem will continue to lose to attackers who already know it’s a highway.
Note: This article was thoughtfully written and contributed to our readers by Alex Gardner, Director of Product Marketing at XM Cyber.
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