CVE-2021-33663: SAP NetWeaver Application Server Abap

Medium severity, CVSS 5.3. EPSS: 0.8% chance of exploitation in the next 30 days.

SAP NetWeaver AS ABAP, 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 - 7.22,8.04,7.49,7.53,7.73,7.77,7.81,7.82,7.83,7.84, allows an unauthorized attacker to insert cleartext commands due to improper restriction of I/O buffering into encrypted SMTP sessions over the network which can partially impact the integrity of the application.

Affected products

• SAP NetWeaver Application Server 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.