CVE-2011-3403

9.3 HIGH 21% exploit odds No fix listed Injection

What it is

Microsoft Excel 2003 SP3 and Office 2004 for Mac do not properly handle objects in memory, which allows remote attackers to execute arbitrary code via a crafted Excel spreadsheet, aka "Record Memory Corruption 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: 20.5% chance of exploitation in the next 30 days (EPSS). Higher than most.
Fix: No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

2011-09-09 00:00 UTC ReservedThe CVE id was reserved by its CNA
2011-12-14 00:55 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-16 23:33 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 20.5% in the next 30 days (EPSS).
Severity: 9.3 HIGH (CVSS).
Fix: none linked yet, which raises it.

Details

Published: 2011-12-14 00:55 UTC
Last modified: 2026-06-16 23:33 UTC
Exploit probability: 20.5% · EPSS, next 30 days
Weakness: CWE-94 · Code injection
Record status: Modified

Affected

Microsoft Excel 2003
Microsoft Office 2004

Attack profile CVSS 2.0 · 9.3

Attack vector: Network
Complexity: Medium
Authentication: None
Confidentiality: Complete
Integrity: Complete
Availability: Complete

Raw vector

AV:N/AC:M/Au:N/C:C/I:C/A:C

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-2011-3403.md and follow it. Check whether this project is affected by CVE-2011-3403. 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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References

NVD record · CVE.org record