CVE-2020-1590: 
vulnerability analysis and mitigation

CVE-2020-1590 is an elevation of privilege vulnerability that exists in the Connected User Experiences and Telemetry Service of Microsoft Windows when it improperly handles file operations. The vulnerability was disclosed in September 2020 and affects multiple versions of Windows 10 and Windows Server (NVD Database).

The vulnerability has received a CVSS v3.1 base score of 7.8 (HIGH) from NIST and 6.6 (MEDIUM) from Microsoft. The vulnerability requires local access (AV:L) with low attack complexity (AC:L) and low privileges (PR:L), with no user interaction (UI:N) needed. The scope is unchanged (S:U), with potential for high impacts on confidentiality, integrity, and availability (C:H/I:H/A:H) according to NIST's assessment (NVD Database).

If successfully exploited, this vulnerability allows an attacker to gain elevated privileges on the victim system. The attacker could potentially execute arbitrary code with elevated system privileges, leading to full system compromise (CVE Details).

To exploit this vulnerability, an attacker would first need to gain execution capabilities on the target system and then run a specially crafted application. The attack requires local access to the system, making it less likely to be exploited remotely (NVD Database).

Microsoft has released security updates to address this vulnerability by correcting how the Connected User Experiences and Telemetry Service handles file operations. The fix is available through various KB updates including KB4570333 for Windows 10 version 1809, KB4574727 for versions 1903 and 1909, and KB4571756 for version 2004 (Rapid7).