CVE-2020-1113 Windows Task Scheduler Security Feature Bypass Vulnerability

Medium 5.3 Published 21 May 2020 Updated 19 Aug 2026

A man-in-the-middle attacker can bypass Task Scheduler RPC validation to execute arbitrary code with administrator privileges on Windows systems.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2020-1113?

CVE-2020-1113 is a medium-severity vulnerability in Microsoft Windows 10, published on 21 May 2020. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A security feature bypass vulnerability exists in Microsoft Windows when the Task Scheduler service fails to properly verify client connections over RPC. An attacker who successfully exploited this vulnerability could run arbitrary code as an administrator. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. To exploit this vulnerability, a man-in-the-middle attacker would need to send a specially crafted request to a vulnerable system. The security update addresses the vulnerability by correcting how the Task Scheduler service validates connections.

Weakness: CWE-295

Which versions are affected by CVE-2020-1113?

It affects 8 products.

Products include Microsoft Windows 10, Microsoft Windows 7, Microsoft Windows 8.1, Microsoft Windows Rt 8.1, Microsoft Windows Server 2008, Microsoft Windows Server 2012 and 2 more.

How do I fix CVE-2020-1113?

No fix has been published for CVE-2020-1113 yet. Limit exposure of the affected software until one is available.

Is CVE-2020-1113 being exploited?

There is no known exploitation of CVE-2020-1113 in the wild and no public exploit code.

All Microsoft Windows 10 vulnerabilities

Sources

Also known as GHSA-8rm2-mc4g-pm72.