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Vulnerability record · CVE-2020-26820 · published 10 November 2020

CVE-2020-26820: Sap netweaver application server java unrestricted file upload vulnerability

Sap · Netweaver Application Server Java

SAP NetWeaver AS JAVA, versions - 7.20, 7.30, 7.31, 7.40, 7.50, allows an attacker who is authenticated as an administrator to use the administrator console, to expose unauthenticated access to the file system and upload a malicious file. The attacker or another user can then use a separate mechanism to execute OS commands through the uploaded file leading to Privilege Escalation and completely compromise the confidentiality, integrity and availability of the server operating system and any application running on it.

7.2 CVSS 3.1 High EPSS 3.9% · top 10.1% CWE-434 · Unrestricted file upload
7.2CVSS 3.1 base score, v2 9.0
3.9%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 JAVA, versions - 7.20, 7.30, 7.31, 7.40, 7.50, allows an attacker who is authenticated as an administrator to use the administrator console, to expose unauthenticated access to the file system and upload a malicious file. The attacker or another user can then use a separate mechanism to execute OS commands through the uploaded file leading to Privilege Escalation and completely compromise the confidentiality, integrity and availability of the server operating system and any application running on it.

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

Affected products

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

References

LinkTags
http://packetstormsecurity.com/files/162086/SAP-Java-OS-Remote-Code-Execution.html Third Party AdvisoryVDB Entry
http://seclists.org/fulldisclosure/2021/Apr/7 Mailing ListThird Party Advisory
https://launchpad.support.sap.com/#/notes/2979062 Permissions RequiredVendor Advisory
https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=562725571 Vendor Advisory
http://packetstormsecurity.com/files/162086/SAP-Java-OS-Remote-Code-Execution.html Third Party AdvisoryVDB Entry
http://seclists.org/fulldisclosure/2021/Apr/7 Mailing ListThird Party Advisory
https://launchpad.support.sap.com/#/notes/2979062 Permissions RequiredVendor Advisory
https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=562725571 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-2020-26820), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.