CVE-2026-4387
CVE-2026-4387 is a low-severity vulnerability with a CVSS 4.0 base score of 2.0. 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-312.
Key facts
- Severity: Low (CVSS 4.0 base score 2.0)
- EPSS exploit prediction: 0% (3rd percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-33417
- Weakness: CWE-312
- Published:
- Last modified:
Description
StrongDM Desktop Application before 23.74.0 (Desktop Client before 53.77.0) on Microsoft Windows stores authentication state, including a JSON Web Token and asymmetric key material, in cleartext in a per-user state file located at C:\Users\<username>\.sdm\state.kv. The file is protected only by default user-level NTFS permissions. Exploitation requires local read access to the affected user's profile directory and additional deployment and execution conditions on the target host. The condition was reported through coordinated disclosure by Hope Walker (SpecterOps).
Frequently asked questions
- What is CVE-2026-4387?
- StrongDM Desktop Application before 23.74.0 (Desktop Client before 53.77.0) on Microsoft Windows stores authentication state, including a JSON Web Token and asymmetric key material, in cleartext in a per-user state file located at C:\Users\<username>\.sdm\state.kv. The file is protected only by default user-level NTFS permissions. Exploitation requires local read access to the affected user's profile directory and additional deployment and execution conditions on the target host. The condition was reported through coordinated disclosure by Hope Walker (SpecterOps).
- How severe is CVE-2026-4387?
- CVE-2026-4387 has a CVSS 4.0 base score of 2.0, rated low severity.
- Is CVE-2026-4387 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (3rd percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2026-4387?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2026-4387 have an EU (EUVD) identifier?
- Yes. CVE-2026-4387 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-33417.
- When was CVE-2026-4387 published?
- CVE-2026-4387 was published on 2026-05-29 and last updated on 2026-06-17.
References
- https://security.strongdm.com/?tcuUid=56fde839-9388-4361-8d3b-9baa7b2de2ed
- https://specterops.io/blog/2026/06/01/cve-2026-4387-strongdm-state-file-reuse/
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