CVE-2008-3477

What it is

Microsoft Excel 2000 SP3, 2002 SP3, and 2003 SP2 and SP3 does not properly validate data in the VBA Performance Cache when processing an Office document with an embedded object, which allows remote attackers to execute arbitrary code via an Excel file containing a crafted value, leading to heap-based buffer overflows, integer overflows, array index errors, and memory corruption, aka "Calendar Object Validation Vulnerability."

At a glance

Exploitability

Can be exploited over the network without logging in. High risk of data exposure, data tampering, service disruption.

Exploit odds

35.7% chance of exploitation in the next 30 days (EPSS). Higher than most.

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2008-10-15 00:12 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-16 22:55 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 35.7% in the next 30 days (EPSS).
• Severity: 9.3 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2008-10-15 00:12 UTC

Last modified

2026-06-16 22:55 UTC

Exploit probability

35.7% · EPSS, next 30 days

Weakness

CWE-399

Record status

Modified

Affected

• Microsoft Internet Explorer 5.01
• Microsoft Internet Explorer 6
• Microsoft Internet Explorer 7

Attack profile CVSS 2.0 · 9.3

Attack vector

Network

Complexity

Medium

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2008-3477.md and follow it. Check whether this project is affected by CVE-2008-3477. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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