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CVE-2026-27671: Memory Corruption vulnerability in Application Server ABAP of SAP NetWeaver and ABAP Platform

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-09 · updated 2026-07-23
• Weakness: CWE-121

Description

Due to improper RFC protocol validation in the SAP Kernel used by the Application Server ABAP of SAP NetWeaver and ABAP Platform, an unauthenticated attacker can send a crafted RFC request that exploits logical errors in memory management, leading to memory corruption. This could lead to a high impact on the confidentiality, integrity, and availability of the application.

Affected products

• SAP_SE SAP NetWeaver Application Server for ABAP and ABAP Platform: KRNL64NUC 7.22, 7.22EXT, KRNL64UC 7.22, 722EXT, 7.53, KERNEL 7.22 (+7)

References

• https://me.sap.com/notes/3717897
• https://url.sap/sapsecuritypatchday

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