How severe is CVE-2026-4064?

CVE-2026-4064 has a CVSS 3.x base score of 8.3, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability low.

Is CVE-2026-4064 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-4064?

CVE-2026-4064 affects Ironmansoftware Powershell Universal. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-4064?

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.

Does CVE-2026-4064 have an EU (EUVD) identifier?

Yes. CVE-2026-4064 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12637.

When was CVE-2026-4064 published?

CVE-2026-4064 was published on 2026-03-17 and last updated on 2026-06-17.

CVE-2026-4064

CVE-2026-4064 is a high-severity vulnerability in Ironmansoftware Powershell Universal with a CVSS 3.x base score of 8.3. 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: High (CVSS 3.x base score 8.3)
EPSS exploit prediction: 0% (29th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-12637
Weakness: CWE-862
Affected product: Ironmansoftware Powershell Universal
Published: 2026-03-17
Last modified: 2026-06-17

Description

Missing authorization checks on multiple gRPC service endpoints in PowerShell Universal before 2026.1.4 allows an authenticated user with any valid token to bypass role-based access controls and perform privileged operations — including reading sensitive data, creating or deleting resources, and disrupting service operations — via crafted gRPC requests.

Frequently asked questions

What is CVE-2026-4064?: Missing authorization checks on multiple gRPC service endpoints in PowerShell Universal before 2026.1.4 allows an authenticated user with any valid token to bypass role-based access controls and perform privileged operations — including reading sensitive data, creating or deleting resources, and disrupting service operations — via crafted gRPC requests.
How severe is CVE-2026-4064?: CVE-2026-4064 has a CVSS 3.x base score of 8.3, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability low.
Is CVE-2026-4064 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-4064?: CVE-2026-4064 affects Ironmansoftware Powershell Universal. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-4064?: 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.
Does CVE-2026-4064 have an EU (EUVD) identifier?: Yes. CVE-2026-4064 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12637.
When was CVE-2026-4064 published?: CVE-2026-4064 was published on 2026-03-17 and last updated on 2026-06-17.

References

https://devolutions.net/security/advisories/DEVO-2026-0008

Affected products (1)

cpe:2.3:a:ironmansoftware:powershell_universal:*:*:*:*:*:*:*:*

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