CVE-2021-27607: SAP NetWeaver As Abap

High severity, CVSS 7.5. EPSS: 1.5% chance of exploitation in the next 30 days.

SAP NetWeaver ABAP Server and ABAP Platform (Dispatcher), versions - KRNL32NUC - 7.22,7.22EXT, KRNL32UC - 7.22,7.22EXT, KRNL64NUC - 7.22,7.22EXT,7.49, KRNL64UC - 8.04,7.22,7.22EXT,7.49,7.53,7.73, KERNEL - 7.22,8.04,7.49,7.53,7.73,7.77,7.81,7.82,7.83, allows an unauthenticated attacker without specific knowledge of the system to send a specially crafted packet over a network which will trigger an internal error in the system due to improper input validation in method ThSncIn() causing the system to crash and rendering it unavailable. In this attack, no data in the system can be viewed or modified.

Affected products

• SAP NetWeaver As Abap: version kernel_7.22 only; version kernel_7.49 only; version kernel_7.53 only; version kernel_7.73 only; version kernel_7.77 only; version kernel_7.81 only; …

Published 2021-06-09. Last modified 2026-06-17.