This security advisory describes one medium risk vulnerability.

1) Input validation error

Severity: Medium

6.5 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C] [PCI]


CWE-20 – Improper Input Validation


The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input within the Remote Desktop Protocol (RDP). A remote attacker can send a specially crafted request and crash the RDP service on the target system.


Install updates from vendor’s website.

Vulnerable software versions

8.1, 10, 10 1607, 10 1709, 10 1803, 10 1809, 10 1903, 10 1909, RT 8.1

Windows Server:
1803, 1903, 1909, 2012, 2012 R2, 2016, 2019

External links

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

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