Security restrictions bypass in Microsoft Exchange Server - CVE-2021-26427
Published: October 12, 2021
Vulnerability identifier: #VU57255
CSH Severity: Medium
CVSSv4.0: CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:U/U:Green
CVE-ID: CVE-2021-26427
CWE-ID: CWE-264
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vulnerable software:
Microsoft Exchange Server
Microsoft Exchange Server
Software vendor:
Microsoft
Microsoft
Description
The vulnerability allows a remote user to escalate privileges on the system.
The vulnerability exists due to application does not properly impose security restrictions. A remote user on the local network can send specially crafted data to the Exchange server and execute arbitrary code with elevated privileges.
Remediation
Install updates from vendor's website.