How severe is CVE-2026-26117?

CVE-2026-26117 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-26117 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-26117?

CVE-2026-26117 affects Microsoft Arc Enabled Servers Azure Connected Machine Agent. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-26117?

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-2026-26117 have an EU (EUVD) identifier?

Yes. CVE-2026-26117 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-10687.

When was CVE-2026-26117 published?

CVE-2026-26117 was published on 2026-03-10 and last updated on 2026-06-17.

CVE-2026-26117

CVE-2026-26117 is a high-severity vulnerability in Microsoft Arc Enabled Servers Azure Connected Machine Agent with a CVSS 3.x base score of 7.8. 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-288.

Key facts

Severity: High (CVSS 3.x base score 7.8)
EPSS exploit prediction: 0% (35th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-10687
Weakness: CWE-288
Affected product: Microsoft Arc Enabled Servers Azure Connected Machine Agent
Published: 2026-03-10
Last modified: 2026-06-17

Description

Authentication bypass using an alternate path or channel in Azure Windows Virtual Machine Agent allows an authorized attacker to elevate privileges locally.

Frequently asked questions

What is CVE-2026-26117?: Authentication bypass using an alternate path or channel in Azure Windows Virtual Machine Agent allows an authorized attacker to elevate privileges locally.
How severe is CVE-2026-26117?: CVE-2026-26117 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-26117 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-26117?: CVE-2026-26117 affects Microsoft Arc Enabled Servers Azure Connected Machine Agent. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-26117?: 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-2026-26117 have an EU (EUVD) identifier?: Yes. CVE-2026-26117 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-10687.
When was CVE-2026-26117 published?: CVE-2026-26117 was published on 2026-03-10 and last updated on 2026-06-17.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26117

Affected products (1)

cpe:2.3:a:microsoft:arc_enabled_servers_azure_connected_machine_agent:*:*:*:*:*:*:*:*

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