Overview
The CVE-2025-54902 vulnerability is a dangerous flaw found in Microsoft Office Excel. It allows an unauthorized attacker to execute code locally through an out-of-bounds read. This vulnerability can lead to potential system compromise or data leakage, making it a significant threat to any organization using the affected versions of Microsoft Office Excel.
Vulnerability Summary
CVE ID: CVE-2025-54902
Severity: High (7.8 CVSS)
Attack Vector: Local
Privileges Required: None
User Interaction: Required
Impact: Potential system compromise and data leakage
Affected Products
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Product | Affected Versions
Microsoft Office Excel | All versions before the latest patch
How the Exploit Works
The exploit works by taking advantage of an out-of-bounds read error in Microsoft Office Excel. The attacker sends a specially crafted file to the victim, who opens it using the vulnerable Excel software. This allows the attacker to read data they’re not supposed to have access to or execute arbitrary code on the victim’s system.
Conceptual Example Code
The following is a
conceptual
example of how this vulnerability might be exploited. The attacker would craft a malicious Excel file with an embedded payload designed to trigger the out-of-bounds read.
# Generate malicious Excel file
$ msfvenom -p windows/exec CMD=calc.exe -f xls > malicious.xls
# Send the malicious file to the victim
$ mail -a malicious.xls -s "Important Document" victim@example.comIn this example, the `msfvenom` command is used to generate a malicious Excel file that, when opened, would execute the `calc.exe` program on the victim’s machine. The malicious file is then sent to the victim via email. When the victim opens the file, the payload is executed, exploiting the vulnerability.
Please note that this is a hypothetical example and is not meant to encourage malicious activities. It is intended to illustrate how such a vulnerability could be exploited.
