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CVE-2025-50171

Microsoft Windows Server 2022 broken access control

9.1 CRITICALEPSS 1.01%
  1. Published12 Aug 2025

Description

Missing authorization in Remote Desktop Server allows an unauthorized attacker to perform spoofing over a network.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected products

Microsoft Windows Server 2022< 10.0.20348.3989
Microsoft Windows Server 2022 23h2< 10.0.25398.1791
Microsoft Windows Server 2025< 10.0.26100.4851

Remediation

Fixed in
Microsoft Windows Server 2022≥ 10.0.20348.3989
Microsoft Windows Server 2022 23h2≥ 10.0.25398.1791
Microsoft Windows Server 2025≥ 10.0.26100.4851

References

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Frequently asked

Is CVE-2025-50171 being actively exploited?

CVE-2025-50171 is not in the CISA KEV catalog. Its EPSS exploit probability is 1.01%.

How severe is CVE-2025-50171?

CVE-2025-50171 has a CVSS 3.1 base score of 9.1, rated critical. EPSS estimates a 1.01% probability of exploitation.

Which products are affected by CVE-2025-50171?

Affected products include Microsoft Windows Server 2022, Microsoft Windows Server 2022 23h2, Microsoft Windows Server 2025.

How do I fix CVE-2025-50171?

Upgrade affected software to a fixed version, for example Microsoft Windows Server 2022 10.0.20348.3989, Microsoft Windows Server 2022 23h2 10.0.25398.1791, Microsoft Windows Server 2025 10.0.26100.4851 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-50171 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.