SB2026041615 - Multiple vulnerabilities in Microsoft Excel

Description

This security bulletin contains information about 5 secuirty vulnerabilities.

1) Out-of-bounds read (CVE-ID: CVE-2026-32188)

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

The vulnerability exists due to a boundary condition in Microsoft Excel. A remote attacker can create a specially crafted file, trick the victim into opening it, trigger an out-of-bounds read error and read contents of memory on the system or perform a denial of service (DoS) attack.

2) Use-after-free (CVE-ID: CVE-2026-32199)

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error in Microsoft Excel. A remote attacker can trick a victim to open a specially crafted file and execute arbitrary cde on the target system.

3) Use-after-free (CVE-ID: CVE-2026-32198)

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error in Microsoft Excel. A remote attacker can trick a victim to open a specially crafted file and execute arbitrary code on the target system.

4) Use-after-free (CVE-ID: CVE-2026-32197)

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error in Microsoft Excel. A remote attacker can trick a victim to open a specially crafted file and execute arbitrary code on the target system.

5) Use-after-free (CVE-ID: CVE-2026-32189)

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error in Microsoft Excel. A remote attacker can trick a victim to open a specially crafted file and execute arbitrary code on the target system.

Remediation

Install update from vendor's website.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32188
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32199
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32198
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32197
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32189