CVE-2004-0840

no score yetEPSS 30%

The SMTP (Simple Mail Transfer Protocol) component of Microsoft Windows XP 64-bit Edition, Windows Server 2003, Windows Server 2003 64-bit Edition, and the Exchange Routing Engine component of Exchange Server 2003, allows remote attackers to execute arbitrary code via a malicious DNS response message containing length values that are not properly validated.

EPSS: 30% chance of exploitation in the next 30 days; higher than 98% of CVEs (scores of 2026-10-31)
CWE: CWE-20
Published: 2004-11-03
Modified: 2026-06-16
Record from: the NVD, synced 2026-10-19

Affected

microsoft:exchange_server
microsoft:windows_server_2003
microsoft:windows_xp

References

http://www.kb.cert.org/vuls/id/394792
http://www.securityfocus.com/bid/11374
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2004/ms04-035
https://exchange.xforce.ibmcloud.com/vulnerabilities/17621
https://exchange.xforce.ibmcloud.com/vulnerabilities/17660

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