SB20260114104 - Multiple vulnerabilities in Microsoft Office

Description

This security bulletin contains information about 3 secuirty vulnerabilities.

1) Untrusted search path (CVE-ID: CVE-2026-20943)

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

The vulnerability exists due to usage of an untrusted search path in Microsoft Office Click-To-Run. A remote attacker can trick a victim to open a specially crafted file and execute arbitrary code with escalated privileges.

2) Use-after-free (CVE-ID: CVE-2026-20952)

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error in Microsoft Office. A remote attacker can run a specially crafted application and execute arbitrary code on the target system.

3) Use-after-free (CVE-ID: CVE-2026-20953)

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error in Microsoft Office. A remote attacker can run a specially crafted application and execute arbitrary code on the target system.

Remediation

Install update from vendor's website.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20943
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20952
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20953