How severe is CVE-2026-59115?

CVE-2026-59115 has a CVSS 3.x base score of 9.9, rated critical 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 high.

Is CVE-2026-59115 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-59115?

CVE-2026-59115 affects Microsoft Entra Provisioning Service. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-59115?

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.

When was CVE-2026-59115 published?

CVE-2026-59115 was published on 2026-08-07.

CVE-2026-59115

CVE-2026-59115 is a critical-severity vulnerability in Microsoft Entra Provisioning Service with a CVSS 3.x base score of 9.9. 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-35.

Key facts

Severity: Critical (CVSS 3.x base score 9.9)
EPSS exploit prediction: 1% (48th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-35
Affected product: Microsoft Entra Provisioning Service
Published: 2026-08-07
Last modified: 2026-08-07

Description

'.../...//' in Microsoft Entra Provisioning Service (SyncFabric) allows an authorized attacker to elevate privileges over a network.

Frequently asked questions

What is CVE-2026-59115?: '.../...//' in Microsoft Entra Provisioning Service (SyncFabric) allows an authorized attacker to elevate privileges over a network.
How severe is CVE-2026-59115?: CVE-2026-59115 has a CVSS 3.x base score of 9.9, rated critical 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 high.
Is CVE-2026-59115 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-59115?: CVE-2026-59115 affects Microsoft Entra Provisioning Service. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-59115?: 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.
When was CVE-2026-59115 published?: CVE-2026-59115 was published on 2026-08-07.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-59115

Affected products (1)

cpe:2.3:a:microsoft:entra_provisioning_service:-:*:*:*:*:*:*:*

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