CVE Vulnerabilities

CVE-2025-30383

Access of Resource Using Incompatible Type ('Type Confusion')

Published: May 13, 2025 | Modified: May 19, 2025
CVSS 3.x
N/A
Source:
NVD
CVSS 2.x
RedHat/V2
RedHat/V3
Ubuntu

Access of resource using incompatible type (type confusion) in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

Weakness

The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type.

Affected Software

Name Vendor Start Version End Version
365_apps Microsoft - (including) - (including)
Excel Microsoft 2016 (including) 2016 (including)
Office Microsoft 2019 (including) 2019 (including)
Office_long_term_servicing_channel Microsoft 2021 (including) 2021 (including)
Office_long_term_servicing_channel Microsoft 2024 (including) 2024 (including)
Office_online_server Microsoft * 16.0.10417.20010 (excluding)

Extended Description

When the product accesses the resource using an incompatible type, this could trigger logical errors because the resource does not have expected properties. In languages without memory safety, such as C and C++, type confusion can lead to out-of-bounds memory access. While this weakness is frequently associated with unions when parsing data with many different embedded object types in C, it can be present in any application that can interpret the same variable or memory location in multiple ways. This weakness is not unique to C and C++. For example, errors in PHP applications can be triggered by providing array parameters when scalars are expected, or vice versa. Languages such as Perl, which perform automatic conversion of a variable of one type when it is accessed as if it were another type, can also contain these issues.

References