CVE-2025-49688: Windows Routing and Remote Access Service (RRAS) Remote Code Execution Vulnerability

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-07-08 · updated 2026-06-17
Weakness: CWE-415

Description

Double free in Windows Routing and Remote Access Service (RRAS) allows an unauthorized attacker to execute code over a network.

Affected products

Microsoft Windows Server 2012: r2
Microsoft Windows Server 2016: before 10.0.14393.8246 — fixed in 10.0.14393.8246
Microsoft Windows Server 2019: before 10.0.17763.7558 — fixed in 10.0.17763.7558
Microsoft Windows Server 2022: before 10.0.20348.3932 — fixed in 10.0.20348.3932
Microsoft Windows Server 2022, 23H2 Edition (Server Core installation): before 10.0.25398.1732 — fixed in 10.0.25398.1732
Microsoft Windows Server 2025: before 10.0.26100.4652 — fixed in 10.0.26100.4652
Microsoft Windows Server 2012 R2: from 6.3.9600.0 before 6.3.9600.22676 — fixed in 6.3.9600.22676
Microsoft Windows Server 2016: from 10.0.14393.0 before 10.0.14393.8246 — fixed in 10.0.14393.8246
Microsoft Windows Server 2019: from 10.0.17763.0 before 10.0.17763.7558 — fixed in 10.0.17763.7558
Microsoft Windows Server 2022: from 10.0.20348.0 before 10.0.20348.3932 — fixed in 10.0.20348.3932
Microsoft Windows Server 2022, 23H2 Edition (Server Core installation): from 10.0.25398.0 before 10.0.25398.1732 — fixed in 10.0.25398.1732
Microsoft Windows Server 2025: from 10.0.26100.0 before 10.0.26100.4652 — fixed in 10.0.26100.4652

How to fix

Upgrade to a fixed version: Microsoft Windows Server 2016 10.0.14393.8246; Microsoft Windows Server 2019 10.0.17763.7558; Microsoft Windows Server 2022 10.0.20348.3932; Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.1732; Microsoft Windows Server 2025 10.0.26100.4652; Microsoft Windows Server 2012 R2 6.3.9600.22676; Microsoft Windows Server 2016 10.0.14393.8246; Microsoft Windows Server 2019 10.0.17763.7558; Microsoft Windows Server 2022 10.0.20348.3932; Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.1732; Microsoft Windows Server 2025 10.0.26100.4652. Check the vendor advisory for mitigations.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-49688

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