CVE-2021-42138
CVE-2021-42138 is a high-severity vulnerability in Thalesgroup Safenet Windows Logon Agent with a CVSS 3.x base score of 7.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-331.
Key facts
- Severity: High (CVSS 3.x base score 7.2)
- CVSS v2: 3.5
- EPSS exploit prediction: 1% (44th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-331
- Affected product: Thalesgroup Safenet Windows Logon Agent
- Published:
- Last modified:
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.
Frequently asked questions
- What is 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 the users on that machine.
- How severe is CVE-2021-42138?
- CVE-2021-42138 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over local access with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability none.
- Is CVE-2021-42138 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-42138?
- CVE-2021-42138 affects Thalesgroup Safenet Windows Logon Agent. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-42138?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2021-42138 published?
- CVE-2021-42138 was published on 2021-12-20 and last updated on 2026-06-17.
References
- https://cpl.thalesgroup.com/support/security-updates
- 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
Affected products (1)
- cpe:2.3:a:thalesgroup:safenet_windows_logon_agent:*:*:*:*:*:*:*:*
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