Unrestricted file upload in SAP NetWeaver AS JAVA
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-434.
Summary
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.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| SAP | SAP NetWeaver AS JAVA | before 7.20; before 7.30; before 7.31; before 7.40; before 7.50 | 7.20, 7.30, 7.31, 7.40, 7.50 | Patch available | CNA |
- SAP NetWeaver AS JAVA VendorSAP Affected before 7.20; before 7.30; before 7.31; before 7.40; before 7.50 Fixed in 7.20, 7.30, 7.31, 7.40, 7.50 Patch available CNA
CPE configurations NVD · 5
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:sap:netweaver_application_server_java:7.20:*:*:*:*:*:*:* | 7.20 | Vulnerable | SAP |
| cpe:2.3:a:sap:netweaver_application_server_java:7.30:*:*:*:*:*:*:* | 7.30 | Vulnerable | SAP |
| cpe:2.3:a:sap:netweaver_application_server_java:7.31:*:*:*:*:*:*:* | 7.31 | Vulnerable | SAP |
| cpe:2.3:a:sap:netweaver_application_server_java:7.40:*:*:*:*:*:*:* | 7.40 | Vulnerable | SAP |
| cpe:2.3:a:sap:netweaver_application_server_java:7.50:*:*:*:*:*:*:* | 7.50 | Vulnerable | SAP |
- cpe:2.3:a:sap:netweaver_application_server_java:7.20:*:*:*:*:*:*:* Versions 7.20 Vulnerable ·SAP
- cpe:2.3:a:sap:netweaver_application_server_java:7.30:*:*:*:*:*:*:* Versions 7.30 Vulnerable ·SAP
- cpe:2.3:a:sap:netweaver_application_server_java:7.31:*:*:*:*:*:*:* Versions 7.31 Vulnerable ·SAP
- cpe:2.3:a:sap:netweaver_application_server_java:7.40:*:*:*:*:*:*:* Versions 7.40 Vulnerable ·SAP
- cpe:2.3:a:sap:netweaver_application_server_java:7.50:*:*:*:*:*:*:* Versions 7.50 Vulnerable ·SAP
Remediation
- Fix · CNA SAP NetWeaver AS JAVA (SAP SE) Fixed in 7.20, 7.30, 7.31, 7.40, 7.50
Timeline
- 2026-10-02 Threatist record created from CVE-2020-26820
- 2026-10-03 Alias added: GHSA-62xw-wxv8-j4h9
- 2026-10-06 EPSS moved to the 90th–95th percentile
References
Advisory 4
More SAP Netweaver Application Server Java vulnerabilities
- TI-2020-05139 Missing authentication in SAP NetWeaver AS JAVA KEVCVSS 3.1CRITICAL 10.0
- TI-2016-02146 SQL injection vulnerability in the UDDI server in SAP NetWeaver J2EE Engine 7.40 allows… KEVCVSS 3.1CRITICAL 9.8
- TI-2010-05023 The Invoker Servlet on SAP NetWeaver Application Server Java platforms, possibly before… KEVCVSS 3.1CRITICAL 10.0
- TI-2017-09362 Directory traversal vulnerability in scheduler/ui/js/ffffffffbca41eb4/UIUtilJavaScriptJS… KEVCVSS 3.1HIGH 7.5
- TI-2016-03377 Directory traversal vulnerability in SAP NetWeaver AS Java 7.1 through 7.5 allows remote… KEVCVSS 3.1HIGH 7.5
- TI-2016-07786 BC-BMT-BPM-DSK in SAP NetWeaver AS JAVA 7.5 allows remote authenticated users to conduct… KEVCVSS 3.1MEDIUM 6.5
Sources
- CVE-2020-26820 · CVE Program
- CVE-2020-26820 · NVD
- FIRST EPSS
- GHSA-62xw-wxv8-j4h9 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences