SB2025081268 - Multiple vulnerabilities in Microsoft Exchange Server

Description

This security bulletin contains information about 4 secuirty vulnerabilities.

1) Improper validation of syntactic correctness of input (CVE-ID: CVE-2025-25007)

The vulnerability allows a remote attacker to perform spoofing attack.

The vulnerability exists due to improper input validation. A remote attacker can spoof incorrect 5322.From email address that is displayed to a user.

2) Improper handling of additional special element (CVE-ID: CVE-2025-25006)

The vulnerability allows a remote attacker to perform spoofing attack.

The vulnerability exists due to improper input validation. A remote attacker can spoof incorrect 5322.From email address that is displayed to a user.

3) Input validation error (CVE-ID: CVE-2025-25005)

The vulnerability allows a remote user to perform a MitM attack.

The vulnerability exists due to insufficient validation of user-supplied input. A remote user can perform data tampering.

4) Information disclosure (CVE-ID: CVE-2025-33051)

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to excessive data output by the application. A remote attacker can gain unauthorized access to sensitive information on the system.

Remediation

Install update from vendor's website.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2025-25007
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2025-25006
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2025-25005
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2025-33051