Arbitrary file upload in SAP Netweaver Application Server Java
CVE-2020-26820
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.
Vulnerability class: Unrestricted File Upload
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.039 (90.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 90th percentile — 90.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.039 · newest: 0.039 · change: 0.000
Affected products
- SAP Netweaver Application Server Java — versions 7.20, 7.30, 7.31
- SAP Se Netweaver As Java — versions < 7.20, < 7.30, < 7.31
Weakness classification (CWE)
Public proof-of-concept exploits
References
- wiki.scn.sap.com/wiki/pages/viewpage.action (Vendor Advisory)
- launchpad.support.sap.com/ (Permissions Required, Vendor Advisory)
- seclists.org/fulldisclosure/2021/Apr/7 (mailing-list, Mailing List, Third Party Advisory)
- packetstormsecurity.com/files/162086/SAP-Java-OS-Remote-Code-Execution.html (VDB Entry, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-26820?
- CVE-2020-26820 is a high-severity vulnerability in SAP Netweaver Application Server Java, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 7.2/10. Published 2020-11-10.
- How severe is CVE-2020-26820?
- High severity. CVSS v3 base score is 7.2 out of 10.
- Is CVE-2020-26820 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.