Synced 16 Jun 2026 15:24 UTC Account
← All products

CVE-2004-0840

HIGH severity · CVSS 10 · Improper input validation
10CVSS HIGH

Summary

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.

Impact & exploitability

Attack vectorNetwork
Attack complexityLow
Privileges required
User interaction
Confidentiality impact
Integrity impact
Availability impact
Exploit probability (EPSS)30%

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

Affected products we track (1)

Recommendation

Apply the vendor fix promptly. Open any affected product above for its exact safe version.

Official patch: http://www.kb.cert.org/vuls/id/394792 ↗