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High Risk in Excel File Parsing Could Let Hackers Run Code

A serious security flaw has been found in a common tool used to read Excel files in some software. This flaw could allow attackers to run harmful code on your computer if you open a malicious Excel file. It’s important for small organisations to be aware and take steps to protect themselves.

24 May 2026

Reference: CVE-2023-7101

1. What is being reported?

The vulnerability is in a software module called Spreadsheet::ParseExcel, which helps programs read Excel files. It incorrectly handles certain parts of the Excel file, allowing attackers to insert harmful commands that the software might run without checking. This can lead to attackers taking control of the affected system.

2. What this means in plain English

If your organisation uses software that relies on this Excel-reading tool, opening a specially crafted Excel file could let hackers run dangerous commands on your computer. This could lead to data theft, disruption, or other serious problems.

3. Could this affect a small business?

Small businesses that use software built with this Excel parsing tool might be at risk, especially if they regularly open Excel files from unknown or untrusted sources. If your software does not use this module, or you do not open Excel files from outside trusted contacts, the risk is lower. Check with your IT provider to be sure.

4. What to do now

  • Avoid opening Excel files from unknown or untrusted sources.
  • Ask your IT provider if any software you use relies on Spreadsheet::ParseExcel version 0.65 or similar.
  • Ensure your software and systems are updated with the latest security patches.
  • Consider using security software that can scan files for malicious content before opening.

5. Ask your IT provider

Can you confirm whether any software we use relies on Spreadsheet::ParseExcel version 0.65, and if so, what steps are being taken to protect us from the related security vulnerability CVE-2023-7101?

6. Bottom line

Be cautious with Excel files from unknown sources and check with your IT support to ensure your software is protected against this serious vulnerability.

Information based on NVD, CISA KEV, and reputable security reporting.

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