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Windows RRAS CVE-2026-72950

| EUVDEUVD-2026-73672 HIGH
Heap-based Buffer Overflow (CWE-122)
2026-09-08 secure@microsoft.com GHSA-xq8j-6r73-v4mq
8.8
CVSS 3.1 · Vendor: microsoft
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Severity by source

Vendor (microsoft) PRIMARY
8.8 HIGH
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
vuln.today AI
8.8 HIGH

Network-reachable RRAS service requires low-privilege authentication; heap overflow yields full C/I/A compromise with no user interaction needed.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (microsoft).

CVSS VectorVendor: microsoft

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

3
Analysis Generated
Sep 08, 2026 - 23:50 vuln.today
Patch available
Sep 08, 2026 - 18:35 EUVD
CVE Published
Sep 08, 2026 - 18:20 nvd
HIGH 8.8

DescriptionCVE.org

Remote Code Execution in Windows Routing and Remote Access Service (RRAS) allows attacker to gain an unauthorized access to victim's machine

AnalysisAI

Heap-based buffer overflow in Windows Routing and Remote Access Service (RRAS) enables a network-authenticated attacker to execute arbitrary code with full system impact across a broad range of Microsoft Windows releases. The vulnerability (CWE-122) affects Windows 10, Windows 11, and Windows Server 2012 through 2025, with vendor-released patches available via MSRC. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Delivery
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Exploit
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Execution
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Persist
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Impact
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Vulnerability AssessmentAI

Exploitation Exploitation requires at minimum low-privilege authentication (PR:L per CVSS vector) - a valid user account or credentials accepted by the RRAS endpoint. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 8.8 vector (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) describes a network-reachable heap overflow that requires only low-privilege authentication, with full confidentiality, integrity, and availability impact on the compromised host. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Apply the Microsoft security update to bring affected systems to the patched build versions specified per Windows release - for example, Windows Server 2025 to build 10.0.26100.33438, Windows Server 2022 to 10.0.20348.5622, Windows Server 2019 to 10.0.17763.9245, and Windows 11 24H2 to 10.0.26100.9445 (full per-version table at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-72950). … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours, inventory all Windows systems with RRAS enabled and confirm patch deployment readiness across your infrastructure. …

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CVE-2026-72950 vulnerability details – vuln.today

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