What’s Vulnerable › Vulnerabilities

CVE-2021-27633

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-06-09 · updated 2026-06-17
• Weakness: CWE-787

Description

SAP NetWeaver AS for ABAP (RFC Gateway), versions - KRNL32NUC - 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 ThCPIC() 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 SE SAP NetWeaver AS for ABAP (RFC Gateway): kernel_7.22, kernel_7.49, kernel_7.53, kernel_7.73, kernel_8.04, krnl32nuc_7.22 (+10)

References

• https://launchpad.support.sap.com/#/notes/3020209
• https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=578125999
• https://launchpad.support.sap.com/#/notes/3020209
• https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=578125999

Get alerted when CVE-2021-27633 or the next vulnerability affects your stack