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Vulnerability record · CVE-2021-27635 · published 9 June 2021

CVE-2021-27635: Sap netweaver application server for java xml external entity (xxe) vulnerability

Sap · Netweaver Application Server For Java

SAP NetWeaver AS for JAVA, versions - 7.20, 7.30, 7.31, 7.40, 7.50, allows an attacker authenticated as an administrator to connect over a network and submit a specially crafted XML file in the application because of missing XML Validation, this vulnerability enables attacker to fully compromise confidentiality by allowing them to read any file on the filesystem or fully compromise availability by causing the system to crash. The attack cannot be used to change any data so that there is no compromise as to integrity.

6.5 CVSS 3.1 Medium EPSS 1.6% · top 25.3% CWE-611 · XML external entity (XXE)
6.5CVSS 3.1 base score, v2 5.5
1.6%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
17 Jun 2026Last modified by NVD

Description

SAP NetWeaver AS for JAVA, versions - 7.20, 7.30, 7.31, 7.40, 7.50, allows an attacker authenticated as an administrator to connect over a network and submit a specially crafted XML file in the application because of missing XML Validation, this vulnerability enables attacker to fully compromise confidentiality by allowing them to read any file on the filesystem or fully compromise availability by causing the system to crash. The attack cannot be used to change any data so that there is no compromise as to integrity.

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

Affected products

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

References

LinkTags
http://packetstormsecurity.com/files/164592/SAP-JAVA-NetWeaver-System-Connections-XML-Injection.html PatchThird Party AdvisoryVDB Entry
http://seclists.org/fulldisclosure/2021/Oct/28 Mailing ListPatchThird Party Advisory
https://launchpad.support.sap.com/#/notes/3053066 Permissions RequiredVendor Advisory
https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=578125999 Vendor Advisory
http://packetstormsecurity.com/files/164592/SAP-JAVA-NetWeaver-System-Connections-XML-Injection.html PatchThird Party AdvisoryVDB Entry
http://seclists.org/fulldisclosure/2021/Oct/28 Mailing ListPatchThird Party Advisory
https://launchpad.support.sap.com/#/notes/3053066 Permissions RequiredVendor Advisory
https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=578125999 Vendor Advisory

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Related vulnerabilities

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

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Source: NIST National Vulnerability Database (record CVE-2021-27635), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.