How severe is CVE-2026-70178?

CVE-2026-70178 has a CVSS 3.x base score of 8.5, rated high severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-70178 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-70178?

CVE-2026-70178 affects Microsoft Fabric. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-70178?

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.

When was CVE-2026-70178 published?

CVE-2026-70178 was published on 2026-09-03 and last updated on 2026-09-08.

CVE-2026-70178

CVE-2026-70178 is a high-severity vulnerability in Microsoft Fabric with a CVSS 3.x base score of 8.5. 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 8.5)
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-862
Affected product: Microsoft Fabric
Published: 2026-09-03
Last modified: 2026-09-08

Description

Missing authorization in Microsoft Fabric allows an authorized attacker to elevate privileges over a network.

Frequently asked questions

What is CVE-2026-70178?: Missing authorization in Microsoft Fabric allows an authorized attacker to elevate privileges over a network.
How severe is CVE-2026-70178?: CVE-2026-70178 has a CVSS 3.x base score of 8.5, rated high severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-70178 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-70178?: CVE-2026-70178 affects Microsoft Fabric. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-70178?: 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.
When was CVE-2026-70178 published?: CVE-2026-70178 was published on 2026-09-03 and last updated on 2026-09-08.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70178

Affected products (1)

cpe:2.3:a:microsoft:fabric:-:*:*:*:*:*:*:*

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