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Windows RRAS EUVDEUVD-2026-73106

| CVE-2026-71351 HIGH
Double Free (CWE-415)
2026-09-08 secure@microsoft.com GHSA-vj4g-p3xx-pxm5
7.0
CVSS 3.1 · Vendor: microsoft
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Severity by source

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

Local vector with low-privilege access matches RRAS service attack surface; AC:H reflects double-free heap-grooming complexity; full C/I/A reflects SYSTEM-level privilege escalation outcome.

3.1 AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
4.0 AV:L/AC:H/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
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

4
Metadata Corrected
Sep 09, 2026 - 00:40 vuln.today
tag: Information Disclosure removed
Analysis Generated
Sep 09, 2026 - 00:06 vuln.today
Patch available
Sep 08, 2026 - 18:35 EUVD
CVE Published
Sep 08, 2026 - 18:20 nvd
HIGH 7.0

DescriptionCVE.org

Double free in Windows Routing and Remote Access Service (RRAS) allows an authorized attacker to elevate privileges locally.

AnalysisAI

Local privilege escalation in Windows Routing and Remote Access Service (RRAS) via a double-free memory corruption flaw (CWE-415) allows an attacker with low-privileged local access to achieve full system compromise across a broad range of Windows 10, Windows 11, and Windows Server versions from 2012 through 2025. Exploitation requires high attack complexity, consistent with the race-condition or precise heap-state manipulation typically needed to weaponize double-free primitives. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Recon
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Delivery
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Exploit
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Install
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C2
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Execute
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Impact
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Vulnerability AssessmentAI

Exploitation Exploitation requires an attacker to already hold a valid, low-privileged local account or active local session on the target Windows system (PR:L, AV:L). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The provided CVSS 3.1 base score of 7.0 (AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H) accurately captures the threat model: local access with low privileges is required, but exploitation is complex. … 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 vendor-released cumulative updates to the patched build versions listed in the affected products section - specific target builds are identified per OS version in the EUVD data (e.g., Windows Server 2025 to 10.0.26100.33438, Windows 11 24H2 to 10.0.26100.9445, Windows Server 2019 to 10.0.17763.9245). … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours, use asset inventory and endpoint management tools to identify all systems running Windows 10, 11, and Windows Server 2012-2025; prioritize Windows Server 2022, 2025, and Windows 11 deployments in production infrastructure. …

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EUVD-2026-73106 vulnerability details – vuln.today

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