CVE-2021-42138
A user of a machine protected by SafeNet Agent for Windows Logon may leverage weak entropy to...
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.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- High
- Privileges needed
- Low
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
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.
- Record
CVE-2021-42138- CVSS 3.1
- 7.2 High
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N - Updated
- 2026-11-02
EUVDEUVD-2021-29121
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.
- Record
EUVD-2021-29121- CVSS 3.1
- 7.2 High
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-5c3c-76cf-7hhm No score
A user of a machine protected by SafeNet Agent for Windows Logon may leverage weak entropy to...
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.
- Record
GHSA-5c3c-76cf-7hhm- Weakness
- CWE-331
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2021-42138- CVSS 3.1
- 7.2 High
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N - CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - CVSS 2.0
- 3.5 Low
AV:N/AC:M/Au:S/C:P/I:N/A:N - Weakness
- CWE-331
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, products | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-42138 is a high vulnerability (CVSS 7.2) in Thales Safenet Authentication Service, published December 20, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.60%, the 48th percentile. No source names a fixed version.
References
supportportal.gemalto.com/csm?sys_kb_id=a52bd13adbff7010f0e322080596194a&id=kb_article_view&sysparm_rank=1&sysparm_tsqueryId=b3bdd932db33b010f0e3220805961955
cpl.thalesgroup.com/support/security-updates
nvd.nist.gov/vuln/detail/CVE-2021-42138
github.com/advisories/GHSA-5c3c-76cf-7hhm