How severe is CVE-2026-5387?

CVE-2026-5387 has a CVSS 4.0 base score of 9.3, rated critical severity.

Is CVE-2026-5387 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-5387?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-5387 have an EU (EUVD) identifier?

Yes. CVE-2026-5387 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-22979.

When was CVE-2026-5387 published?

CVE-2026-5387 was published on 2026-04-15 and last updated on 2026-06-17.

CVE-2026-5387

CVE-2026-5387 is a critical-severity vulnerability with a CVSS 4.0 base score of 9.3. 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-862.

Key facts

Severity: Critical (CVSS 4.0 base score 9.3)
EPSS exploit prediction: 0% (31st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-22979
Weakness: CWE-862
Published: 2026-04-15
Last modified: 2026-06-17

Description

The vulnerability, if exploited, could allow an unauthenticated miscreant to perform operations intended only for Simulator Instructor or Simulator Developer (Administrator) roles, resulting in privilege escalation with potential for modification of simulation parameters, training configuration, and training records.

Frequently asked questions

What is CVE-2026-5387?: The vulnerability, if exploited, could allow an unauthenticated miscreant to perform operations intended only for Simulator Instructor or Simulator Developer (Administrator) roles, resulting in privilege escalation with potential for modification of simulation parameters, training configuration, and training records.
How severe is CVE-2026-5387?: CVE-2026-5387 has a CVSS 4.0 base score of 9.3, rated critical severity.
Is CVE-2026-5387 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-5387?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-5387 have an EU (EUVD) identifier?: Yes. CVE-2026-5387 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-22979.
When was CVE-2026-5387 published?: CVE-2026-5387 was published on 2026-04-15 and last updated on 2026-06-17.

References

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