CVE-2021-33684: SAP NetWeaver Abap

Medium severity, CVSS 5.3. EPSS: 1% chance of exploitation in the next 30 days.

SAP NetWeaver AS ABAP and ABAP Platform, versions - KRNL32NUC 7.21, 7.21EXT, 7.22, 7.22EXT, KRNL32UC 7.21, 7.21EXT, 7.22, 7.22EXT, KRNL64NUC 7.21, 7.21EXT, 7.22, 7.22EXT, 7.49, KRNL64UC 8.04, 7.21, 7.21EXT, 7.22, 7.22EXT, 7.49, 7.53, KERNEL 8.04, 7.21, 7.21EXT, 7.22, 7.22EXT, 7.49, 7.53, 7.77, 7.81, 7.84, allows an attacker to send overlong content in the RFC request type thereby crashing the corresponding work process because of memory corruption vulnerability. The work process will attempt to restart itself after the crash and hence the impact on the availability is low.

Affected products

• SAP NetWeaver Abap: version 7.21 only; version 7.21ext only; version 7.22 only; version 7.22ext only; version 7.49 only; version 7.53 only; …
• SAP NetWeaver Application Server Abap: version 7.21 only; version 7.21ext only; version 7.22 only; version 7.22ext only; version 7.49 only; version 7.53 only; …

Published 2021-07-14. Last modified 2026-06-17.