#VU53909 Security restrictions bypass in Windows and Windows Server - CVE-2021-31199
Published: June 8, 2021
Vulnerability identifier: #VU53909
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:A/U:Green
CVE-ID: CVE-2021-31199
CWE-ID: CWE-264
Exploitation vector: Local access
Exploit availability:
The vulnerability is being exploited in the wild
Vulnerable software:
Windows
Windows Server
Windows
Windows Server
Software vendor:
Microsoft
Microsoft
Description
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to improperly imposed security restrictions in Microsoft Enhanced Cryptographic Provider. A local user can bypass implemented security restrictions and read or modify otherwise restricted information.
Note, the vulnerability is being actively exploited in the wild and related to a zero-day vulnerability in Adobe Reader #VU53125 (CVE-2021-28550) patched on May 11.
Remediation
Install updates from vendor's website.