SB2025011543 - Multiple vulnerabilities in Microsoft Office

Description

This security bulletin contains information about 2 vulnerabilities.

1) Protection Mechanism Failure (CVE-ID: CVE-2025-21346)

CWE-ID: CWE-693 - Protection Mechanism Failure

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to insufficient implementation of security measures in Microsoft Office. A remote attacker can trick a victim to open a specially crafted file and bypass implemented security restrictions.

2) Untrusted search path (CVE-ID: CVE-2025-21365)

CWE-ID: CWE-426 - Untrusted Search Path

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to usage of an untrusted search path in Microsoft Office. A remote attacker can trick a victim to open a specially crafted file and execute arbitrary code on the system.

Remediation

Install update from vendor's website.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2025-21346
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2025-21365