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

Vulnerability summary

CVE-2026-27671 is a critical (CVSS 9.8) Stack-based Buffer Overflow vulnerability in sap_se sap netweaver as abap and abap platform. EPSS estimates a 0.62% chance of exploitation in the next 30 days, higher than 49.2% of scored vulnerabilities.

Timeline

1. 09-06-2026
   PublishedVulnerability first disclosed.
2. 09-06-2026
   Last modifiedVulnerability information updated.

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.

• CWE-121Stack-based Buffer OverflowA stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).