CVE-2026-20868

HIGH
2026-01-13 [email protected]
8.8
CVSS 3.1
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CVSS Vector

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

Lifecycle Timeline

2
Analysis Generated
Mar 12, 2026 - 21:54 vuln.today
CVE Published
Jan 13, 2026 - 18:16 nvd
HIGH 8.8

Tags

Windows Buffer Overflow Heap Overflow Windows Server 2022 Windows Server 2022 23h2 Windows 10 21h2 Windows Server 2019 Windows 10 22h2 Windows 11 23h2 Windows 11 24h2 Windows 11 25h2 Windows Server 2012 Windows Server 2025 Windows 10 1809 Windows Server 2016 Windows 10 1607 Windows Server 2008 Microsoft

Description

Heap-based buffer overflow in Windows Routing and Remote Access Service (RRAS) allows an unauthorized attacker to execute code over a network.

Analysis

Remote code execution in Windows RRAS affects Windows 10 21h2 and Windows Server 2022 variants through a heap-based buffer overflow triggered over the network without authentication. An attacker can exploit this vulnerability to execute arbitrary code with high privileges, though a user interaction is required to trigger the flaw. …

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Remediation

Within 7 days: Identify all affected systems and apply vendor patches promptly. If patching is delayed, consider network segmentation to limit exposure.

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Priority Score

44
Low Medium High Critical
KEV: 0
EPSS: +0.1
CVSS: +44
POC: 0

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CVE-2026-20868 vulnerability details – vuln.today
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