CVE-2019-9510

Microsoft Windows RDP can bypass the Windows lock screen

HIGH
7.8
CVSS Score
Published: January 15, 2020 at 05:05 PM UTC
Updated: June 17, 2026 at 02:43 AM UTC
3 products affected across 1 vendorWindows Server 2019Windows 10Windows Server

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Severity
HIGH7.8
Exploit prediction
EPSS 1%

Description

A vulnerability in Microsoft Windows 10 1803 and Windows Server 2019 and later systems can allow authenticated RDP-connected clients to gain access to user sessions without needing to interact with the Windows lock screen. Should a network anomaly trigger a temporary RDP disconnect, Automatic Reconnection of the RDP session will be restored to an unlocked state, regardless of how the remote system was left. By interrupting network connectivity of a system, an attacker with access to a system being used as a Windows RDP client can gain access to a connected remote system, regardless of whether or not the remote system was locked. This issue affects Microsoft Windows 10, version 1803 and later, and Microsoft Windows Server 2019, version 2019 and later.

Affected

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

1803 ≤ v < 10 *1803
Affected range stops below 10 *, so it looks safe — our inference, not a vendor statement
2019 ≤ v < 2019*2019
Affected range stops below 2019*, so it looks safe — our inference, not a vendor statement

CVSS

Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-288CWE-755

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