Microsoft has released a security rollup patch for Windows XP. Below is a list of the patches included. It does NOT include the critical patches that were just announced yesterday.

810565 Hyperlinks Open in Internet Explorer Instead of in Default Browser
or Help and Support Center
821557 MS03-027: An Unchecked Buffer in the Windows Shell Could Permit Your
System to Be Compromised
811493 MS03-013: Buffer Overrun in Windows Kernel Message Handling Could
Lead to Elevated Privileges
328310 MS02-071: Flaw in Windows WM_TIMER Message Handling Can Enable
Privilege Elevation
823980 MS03-026: Buffer Overrun in RPC May Allow Code Execution 331953 MS03-010: Flaw in RPC Endpoint Mapper Could Allow Denial of Service
Attacks
323255 MS02-055: Unchecked Buffer in Windows Help Facility May Allow
Attacker to Run Code
810577 MS03-005: Unchecked Buffer in Windows Redirector May Permit
Privilege Elevation
815021 MS03-007: Unchecked Buffer in Windows Component May Cause Web Server
Compromise
329115 MS02-050: Certificate Validation Flaw Might Permit Identity Spoofing 329170 MS02-070: Flaw in SMB Signing May Permit Group Policy to Be Modified 817606 MS03-024: Buffer Overrun in Windows Could Lead to Data Corruption 814033 Cannot Install Driver Updates from the Windows Update Web Site 810833 MS03-001: Unchecked Buffer in the Locator Service Might Permit Code
to Run
823559 MS03-023: Buffer Overrun in the HTML Converter Could Allow Code
Execution
329048 MS02-054: Unchecked Buffer in File Decompression Functions May Allow
Attacker to Run Code
329441 You Cannot Create a Network Connection After You Restore Windows XP 817287 Windows Update 643 Error and the Catalog Database 329390 MS02-072: Unchecked Buffer in Windows Shell Might Permit System
Compromise
329834 MS02-063: Unchecked Buffer in PPTP Implementation May Permit
Denial-of-Service Attacks
811630 HTML Help Update to Limit Functionality When It Is Invoked with the
window.showHelp Method
824146 MS03-039: A Buffer Overrun in RPCSS May Allow Code Execution
You can download the update here: Windows XP Security Rollup 1