CVE-2019-9510 — A vulnerability in Microsoft Windows 10 1803 and Windows Server 2019 and later s

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 disconne

01What is this vulnerability?

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…

02Affected products

Vendor	Product	Versions
Microsoft	Windows 10 or newer system using RDP	1803
Microsoft	Windows Server	2019

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2020-01-15T17:05:27.546Z
• Last modified: 2024-09-17T04:00:12.025Z

09References

• www.kb.cert.org — https://www.kb.cert.org/vuls/id/576688/
• docs.microsoft.com — https://docs.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server…
• docs.microsoft.com — https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-rdpbcgr/e729948a…
• social.technet.microsoft.com — https://social.technet.microsoft.com/Forums/windowsserver/en-US/1fd171de-a1b5-47…