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Vulnerability record · CVE-2021-27631 · published 9 June 2021

CVE-2021-27631: Sap netweaver as abap null pointer dereference vulnerability

Sap · Netweaver As Abap

SAP NetWeaver ABAP Server and ABAP Platform (Enqueue Server), 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, 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 EnqConvUniToSrvReq() causing the system to crash and rendering it unavailable. In this attack, no data in the system can be viewed or modified.

7.5 CVSS 3.1 High EPSS 1.5% · top 26.6% CWE-476 · NULL pointer dereference
7.5CVSS 3.1 base score, v2 5.0
1.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

SAP NetWeaver ABAP Server and ABAP Platform (Enqueue Server), 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, 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 EnqConvUniToSrvReq() causing the system to crash and rendering it unavailable. In this attack, no data in the system can be viewed or modified.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://launchpad.support.sap.com/#/notes/3020104 Permissions RequiredVendor Advisory
https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=578125999 Broken LinkVendor Advisory
https://launchpad.support.sap.com/#/notes/3020104 Permissions RequiredVendor Advisory
https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=578125999 Broken LinkVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2022-27668Sap netweaver as abap incorrect authorization vulnerabilityDepending on the configuration of the route permission table in file 'saprouttab', it is possible for an unauthenticated attacker to execute SAProute…EPSS 2.2%8.8CVE-2019-0257Sap netweaver application server abap missing authorization vulnerabilityCustomizing functionality of SAP NetWeaver AS ABAP Platform (fixed in versions from 7.0 to 7.02, from 7.10 to 7.11, 7.30, 7.31, 7.40, from 7.50 to 7.…EPSS 1.4%7.5CVE-2022-22543Sap netweaver abap uncontrolled resource consumption vulnerabilitySAP NetWeaver Application Server for ABAP (Kernel) and ABAP Platform (Kernel) - versions KERNEL 7.22, 8.04, 7.49, 7.53, 7.77, 7.81, 7.85, 7.86, 7.87,…EPSS 1.4%7.5CVE-2021-27629Sap netweaver as abap out-of-bounds read vulnerabilitySAP NetWeaver ABAP Server and ABAP Platform (Enqueue Server), versions - KRNL32NUC - 7.22,7.22EXT, KRNL64NUC - 7.22,7.22EXT,7.49, KRNL64UC - 8.04,7.2…EPSS 1.5%7.5CVE-2021-27630Sap netweaver as abap null pointer dereference vulnerabilitySAP NetWeaver ABAP Server and ABAP Platform (Enqueue Server), versions - KRNL32NUC - 7.22,7.22EXT, KRNL64NUC - 7.22,7.22EXT,7.49, KRNL64UC - 8.04,7.2…EPSS 1.5%7.5CVE-2021-27632Sap netweaver as abap null pointer dereference vulnerabilitySAP NetWeaver ABAP Server and ABAP Platform (Enqueue Server), versions - KRNL32NUC - 7.22,7.22EXT, KRNL64NUC - 7.22,7.22EXT,7.49, KRNL64UC - 8.04,7.2…EPSS 1.5%7.5CVE-2021-27606Sap netweaver as abap out-of-bounds read vulnerabilitySAP NetWeaver ABAP Server and ABAP Platform (Enqueue Server), versions - KRNL32NUC - 7.22,7.22EXT, KRNL64NUC - 7.22,7.22EXT,7.49, KRNL64UC - 8.04,7.2…EPSS 1.5%7.5CVE-2021-27607Sap netweaver as abap null pointer dereference vulnerabilitySAP 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…EPSS 1.5%

Source: NIST National Vulnerability Database (record CVE-2021-27631), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.