IT Glossary

Privilege Escalation

Privilege escalation turns limited access into control. Learn the vertical and horizontal types, and the SaaS path most mid-market teams miss.

August 7, 2026

What is privilege escalation?

Privilege escalation is the act of obtaining a higher level of access than originally granted, either by exploiting a flaw or by using a legitimate permission that should never have been assigned. It is a distinct phase in the MITRE ATT&CK framework, tracked as TA0004, and it is what turns a single compromised account into a full incident.

The two types of privilege escalation

  • Vertical escalation: a standard user obtains administrator or root rights, for example through an unpatched local flaw or a misconfigured service.
  • Horizontal escalation: an attacker moves sideways into another account at the same level, often one holding more valuable data.
  • Common technical paths: unpatched operating system flaws, over-permissioned service accounts, exposed API keys, and misconfigured cloud roles.
  • Common non-technical paths: help desk social engineering, and admin rights granted for a migration and never removed.

The SaaS path most teams miss

In cloud-first companies the most common escalation is not an exploit at all. It is an employee who legitimately holds admin rights in six SaaS applications because a project needed them two years ago. No alert fires, because nothing was breached. The privilege was granted properly and simply never reviewed, and it is the standing target every phishing campaign is looking for.

Examples and use cases

A marketing manager receives owner rights on the CRM to run a data import. The import ends, the rights stay. Eighteen months later her credentials are phished and the attacker exports the entire customer base. There was no vulnerability and no alert. The control that catches this is a recurring review of who holds administrative roles in every application, which Corma runs across the full SaaS estate rather than only the tools connected to the identity provider.

Related concepts

FAQ

What is the difference between vertical and horizontal privilege escalation?

Vertical escalation raises the attacker to a higher permission tier such as administrator. Horizontal escalation moves them into another account at the same tier, usually one with better data.

How do you prevent privilege escalation?

Apply least privilege, patch systems promptly, replace standing admin rights with time-bounded elevation, and review administrative roles on a fixed schedule.

Is privilege escalation always an attack?

The technique is, but the condition that enables it is usually ordinary operations: permissions granted for a legitimate reason and never revoked afterward.

Which accounts should be reviewed first?

Administrator accounts, finance accounts, and anything holding API or integration credentials. These carry the widest blast radius if they are compromised.

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