Elevation of Privilege Vulnerability Affects Microsoft Exchange Server
CVE-2024-21410

9.8CRITICAL

Key Information:

Vendor: Microsoft
Status: Microsoft Exchange Server 2016 Cumulative Update 23; Microsoft Exchange Server 2019 Cumulative Update 13; Microsoft Exchange Server 2019 Cumulative Update 14
Vendor: CVE Published:; 13 February 2024

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📈 Trended📈 Score: 9,880👾 Exploit Exists🦅 CISA Reported📰 News Worthy

What is CVE-2024-21410?

CVE-2024-21410 is a critical elevation of privilege vulnerability within Microsoft Exchange Server, a widely used messaging and collaboration platform that facilitates email communication, calendar sharing, and other collaborative functions in organizations. This vulnerability allows attackers to elevate their privileges, potentially gaining unauthorized access to sensitive information and administrative capabilities. As Exchange Server is integral to many businesses' operations, the exploitation of this vulnerability could severely disrupt workflows, compromise data integrity, and expose organizations to further attacks.

Technical Details

The vulnerability specifically involves a flaw in the way Microsoft Exchange Server handles permissions. Attackers with low-level access may exploit this flaw to gain higher-level privileges, enabling them to execute unauthorized commands or access restricted data. Due to the critical nature of email services and data handled by Exchange Server, this weakness poses a high risk and may be leveraged in conjunction with other attacks to compromise an organization's network security.

Impact of the Vulnerability

Unauthorized Access: Exploitation of CVE-2024-21410 could allow an attacker to gain administrative privileges, leading to unauthorized access to critical systems and sensitive information.
Data Compromise: With elevated privileges, attackers may manipulate, exfiltrate, or delete sensitive data, thereby jeopardizing the integrity and confidentiality of organizational information.
Increased Attack Surface: The existence of this vulnerability can be a stepping stone for further attacks on the organization, as compromised accounts may be used to pivot into deeper network penetration or to launch ransomware attacks.

CISA Reported

CISA provides regional cyber and physical services to support security and resilience across the United States. CISA monitor the most dangerious vulnerabilities and have identifed as being exploited but is not known by the CISA to be used in ransomware campaigns. This is subject to change at pace

The CISA's recommendation is: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Affected Version(s)

Microsoft Exchange Server 2016 Cumulative Update 23 x64-based Systems 15.01.0 < 15.01.2507.037

Microsoft Exchange Server 2019 Cumulative Update 13 x64-based Systems 15.02.0 < 15.2.1544.004

Microsoft Exchange Server 2019 Cumulative Update 14 x64-based Systems 15.02.0 < 15.2.1544.004

News Articles

Beeping Computers

CVE-2024-21410

Germany warns of 17K vulnerable Microsoft Exchange servers exposed online

The German national cybersecurity authority warned on Tuesday that it found at least 17,000 Microsoft Exchange servers in Germany exposed online and vulnerable to one or more critical security vulnerabilities.

9 months ago