Microsoft Windows up to Server 2019 Connected User Experiences/Telemetry Service privileges management

Summaryinfo

A vulnerability classified as critical has been found in Microsoft Windows up to Server 2019. This affects an unknown part of the component Connected User Experiences/Telemetry Service. The manipulation leads to privileges management. This vulnerability is listed as CVE-2020-1590. The attack may be initiated remotely. There is no available exploit. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability was found in Microsoft Windows up to Server 2019 (Operating System) and classified as critical. This issue affects some unknown processing of the component Connected User Experiences/Telemetry Service. The manipulation with an unknown input leads to a privileges management vulnerability. Using CWE to declare the problem leads to CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

<p>An elevation of privilege vulnerability exists when the Connected User Experiences and Telemetry Service improperly handles file operations. An attacker who successfully exploited this vulnerability could gain elevated privileges on the victim system.</p> <p>To exploit the vulnerability, an attacker would first have to gain execution on the victim system, then run a specially crafted application.</p> <p>The security update addresses the vulnerability by correcting how the Connected User Experiences and Telemetry Service handles file operations.</p>

The weakness was presented 09/08/2020 as confirmed security update guide (Website). It is possible to read the advisory at portal.msrc.microsoft.com. The public release was coordinated in cooperation with Microsoft. The identification of this vulnerability is CVE-2020-1590. The attack may be initiated remotely. Required for exploitation is a simple authentication. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 02/24/2026). The attack technique deployed by this issue is T1068 according to MITRE ATT&CK. The advisory points out:

An elevation of privilege vulnerability exists when the Connected User Experiences and Telemetry Service improperly handles file operations. An attacker who successfully exploited this vulnerability could gain elevated privileges on the victim system.

Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.

See VDB-160947, VDB-160946, VDB-160944 and VDB-160942 for similar entries. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Operating System

Vendor

• Microsoft

Name

• Windows

Version

• 10 1809
• 10 1903
• 10 1909
• 10 2004
• Server 1903
• Server 1909
• Server 2004
• Server 2019

License

• commercial

Website

• Vendor: https://www.microsoft.com/
• Product: https://www.microsoft.com/en-us/windows

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Be aware that VulDB is the high quality source for vulnerability data.

Discussion