SAP patch day trust-path flaws: what IAM and Basis teams need to know

TL;DR: SAP’s January 2026 Patch Day includes 17 security notes, with four Critical and four High issues concentrated in RFC paths, database privilege boundaries, and admin tooling, according to Pathlock. The pattern is structural: stolen credentials and overbroad trust relationships can turn routine SAP access into lateral movement and full compromise.

NHIMG editorial — based on content published by Pathlock: SAP January 2026 patch day analysis

By the numbers:

• SAP released 17 Security Notes on the January 2026 Patch Day, with four Critical and four High issues.

Questions worth separating out

Q: How should teams reduce risk from RFC-exposed SAP vulnerabilities?

A: Teams should treat RFC permissions as high-risk identity scope, not just transport access.

Q: Why do technical SAP accounts create disproportionate blast radius?

A: Technical accounts often connect multiple systems, carry elevated permissions, and bypass user-facing controls.

Q: What breaks when HANA credentials are impersonated or escalated?

A: Database user separation breaks, along with the assumptions that low-privileged access cannot become administrative without an explicit approval step.

Practitioner guidance

• Audit RFC trust paths and S_RFC breadth Inventory RFC destinations, technical users, and function groups that can reach finance, analytics, or transformation modules.
• Prioritise patching for code-injection and privilege-escalation notes Treat the S/4HANA Finance injection, the two RFC-exposed code-injection notes, and the HANA impersonation issue as first-wave remediation because they collapse internal trust into direct compromise.
• Constrain admin tooling to dedicated segments Restrict monitoring and Basis tools to admin-only subnets, remove browser-based launch paths where possible, and monitor for unusual JNLP launch behaviour or workstation activity after link clicks.

What's in the full article

Pathlock's full research covers the operational detail this post intentionally leaves for the source:

• Note-by-note breakdown of all 17 SAP Security Notes and their support-package requirements
• Patch sequencing guidance for Critical and High issues across finance, analytics, HANA, and monitoring tooling
• Detailed mitigation steps for S_RFC hardening, admin-network restriction, and monitoring priorities
• Component-level exposure notes for S/4HANA, DMIS/SLT, Introscope, and HANA environments

👉 Read Pathlock's analysis of SAP January 2026 patch day risk →

SAP patch day trust-path flaws: what IAM and Basis teams need to know?

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