Vulnerability identifier: #VU57252

Vulnerability risk: Medium

CVSSv3.1: 6.4 [CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-41348

CWE-ID: CWE-264

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
Microsoft Exchange Server
Server applications / Mail servers

Vendor: 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, which leads to security restrictions bypass and privilege escalation.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Microsoft Exchange Server: 2019 RTM 15.02.0221.012 - 2019 Cumulative Update 11 15.02.0986.005, 2016 RTM 15.01.0225.042 - 2016 Cumulative Update 22 15.01.2375.007

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External links
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-41348

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.