CVE-2021-27635

Name: CVE-2021-27635
Creator: NVD / NIST
Published: 2021-06-09T14:15:09.453+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 1.59%

Last modified Jun 17, 2026

CVE-2021-27635 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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.. EPSS estimates a 1.59% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

1.59%

72.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-611

Affected Software

Vendor	Product	Versions
Sap	Netweaver Application Server For Java	7.20
Sap	Netweaver Application Server For Java	7.30
Sap	Netweaver Application Server For Java	7.31
Sap	Netweaver Application Server For Java	7.40
Sap	Netweaver Application Server For Java	7.50

References

http://packetstormsecurity.com/files/164592/SAP-JAVA-NetWeaver-System-Connections-XML-Injection.htmlPatch, Third Party Advisory, VDB Entry
http://seclists.org/fulldisclosure/2021/Oct/28Mailing List, Patch, Third Party Advisory
https://launchpad.support.sap.com/#/notes/3053066Permissions Required, Vendor Advisory
https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=578125999Vendor Advisory
http://packetstormsecurity.com/files/164592/SAP-JAVA-NetWeaver-System-Connections-XML-Injection.htmlPatch, Third Party Advisory, VDB Entry
http://seclists.org/fulldisclosure/2021/Oct/28Mailing List, Patch, Third Party Advisory
https://launchpad.support.sap.com/#/notes/3053066Permissions Required, Vendor Advisory
https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=578125999Vendor Advisory

Timeline

Published: Jun 9, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-27635?

How severe is CVE-2021-27635?

CVE-2021-27635 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.59% probability of exploitation in the next 30 days.

How do I fix CVE-2021-27635?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-27635?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST