How severe is CVE-2025-29973?

CVE-2025-29973 has a CVSS 3.x base score of 7.0, rated high severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-29973 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-29973?

CVE-2025-29973 primarily affects Microsoft Azure File Sync. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-29973?

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-2025-29973 have an EU (EUVD) identifier?

Yes. CVE-2025-29973 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-14465.

When was CVE-2025-29973 published?

CVE-2025-29973 was published on 2025-05-13 and last updated on 2026-06-17.

CVE-2025-29973

CVE-2025-29973 is a high-severity vulnerability in Microsoft Azure File Sync with a CVSS 3.x base score of 7.0. 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-284.

Key facts

Severity: High (CVSS 3.x base score 7.0)
EPSS exploit prediction: 0% (23rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-14465
Weakness: CWE-284
Affected product: Microsoft Azure File Sync
Published: 2025-05-13
Last modified: 2026-06-17

Description

Improper access control in Azure File Sync allows an authorized attacker to elevate privileges locally.

Frequently asked questions

What is CVE-2025-29973?: Improper access control in Azure File Sync allows an authorized attacker to elevate privileges locally.
How severe is CVE-2025-29973?: CVE-2025-29973 has a CVSS 3.x base score of 7.0, rated high severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-29973 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-29973?: CVE-2025-29973 primarily affects Microsoft Azure File Sync. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-29973?: 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-2025-29973 have an EU (EUVD) identifier?: Yes. CVE-2025-29973 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-14465.
When was CVE-2025-29973 published?: CVE-2025-29973 was published on 2025-05-13 and last updated on 2026-06-17.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-29973

Affected products (2)

cpe:2.3:a:microsoft:azure_file_sync:19.0.0.0:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:azure_file_sync:20.0.0.0:*:*:*:*:*:*:*

More vulnerabilities in Microsoft Azure File Sync

CVE-2025-53729 — High (CVSS 7.8): Improper access control in Azure File Sync allows an authorized attacker to elevate privileges locally.
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CVE-2024-35253 — Medium (CVSS 4.4): Microsoft Azure File Sync Elevation of Privilege Vulnerability

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