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CVE-2025-26677

Windows Remote Desktop Gateway (RD Gateway) Denial of Service Vulnerability

HIGH
7.5
CVSS Score
Published: May 13, 2025 at 04:58 PM UTC
Updated: June 17, 2026 at 09:02 AM UTC
6 products affected across 1 vendorWindows Server 2016Windows Server 2019Windows Server 2022

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Severity
HIGH7.5
Exploit prediction
EPSS 2%
SSVC
No known exploit

Description

Uncontrolled resource consumption in Remote Desktop Gateway Service allows an unauthorized attacker to deny service over a network.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Windows Server 2016· Microsoft
95%
v < 10.0.14393.806610.0.14393.0 ≤ v < 10.0.14393.806610.0.14393.0
Affected range stops below 10.0.14393.8066, so it looks safe — our inference, not a vendor statement
Windows Server 2019· Microsoft
95%
v < 10.0.17763.731410.0.17763.0 ≤ v < 10.0.17763.731410.0.17763.0
Affected range stops below 10.0.17763.7314, so it looks safe — our inference, not a vendor statement
Windows Server 2022· Microsoft
95%
v < 10.0.20348.369210.0.20348.0 ≤ v < 10.0.20348.369210.0.20348.0
Affected range stops below 10.0.20348.3692, so it looks safe — our inference, not a vendor statement
Windows Server 2022 23H2· Microsoft
95%
v < 10.0.25398.161110.0.25398.0 ≤ v < 10.0.25398.161110.0.25398.0
Affected range stops below 10.0.25398.1611, so it looks safe — our inference, not a vendor statement
Windows Server 2025· Microsoft
95%
v < 10.0.26100.406110.0.26100.0 ≤ v < 10.0.26100.406110.0.26100.0
Affected range stops below 10.0.26100.4061, so it looks safe — our inference, not a vendor statement
Windows Server 23H2· Microsoft
95%
10.0.25398.0 ≤ v < 10.0.25398.1611
Affected range stops below 10.0.25398.1611, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor AdvisoryPatch
Source: [email protected]
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-26677

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHmicrosoft
Vector?

Quick Info

StatusANALYZED
CWE
CWE-400CWE-770

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