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CVE-2025-26671

Microsoft Windows Server 2016 use-after-free

8.1 HIGHEPSS 1.18%
  1. Published8 Apr 2025

Description

Use after free in Windows Remote Desktop Services allows an unauthorized attacker to execute code over a network.

CVSS 3.1 breakdown

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

Affected products

Microsoft Windows Server 2008r2
Microsoft Windows Server 2012r2
Microsoft Windows Server 2016< 10.0.14393.7969
Microsoft Windows Server 2019< 10.0.17763.7136
Microsoft Windows Server 2022< 10.0.20348.3453
Microsoft Windows Server 2022 23h2< 10.0.25398.1551
Microsoft Windows Server 2025< 10.0.26100.3775

Remediation

Fixed in
Microsoft Windows Server 2016≥ 10.0.14393.7969
Microsoft Windows Server 2019≥ 10.0.17763.7136
Microsoft Windows Server 2022≥ 10.0.20348.3453
Microsoft Windows Server 2022 23h2≥ 10.0.25398.1551
Microsoft Windows Server 2025≥ 10.0.26100.3775

References

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Frequently asked

Is CVE-2025-26671 being actively exploited?

CVE-2025-26671 is not in the CISA KEV catalog. Its EPSS exploit probability is 1.18%.

How severe is CVE-2025-26671?

CVE-2025-26671 has a CVSS 3.1 base score of 8.1, rated high. EPSS estimates a 1.18% probability of exploitation.

Which products are affected by CVE-2025-26671?

Affected products include Microsoft Windows Server 2008, Microsoft Windows Server 2012, Microsoft Windows Server 2016, Microsoft Windows Server 2019, Microsoft Windows Server 2022, and 2 more.

How do I fix CVE-2025-26671?

Upgrade affected software to a fixed version, for example Microsoft Windows Server 2016 10.0.14393.7969, Microsoft Windows Server 2019 10.0.17763.7136, Microsoft Windows Server 2022 10.0.20348.3453 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-26671 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.