CVE-2009-20005 CRITICAL

CVE-2009-20005: InterSystems Caché UtilConfigHome.csp Stack Buffer Overflow

Vendor Intersystems Corporation
Product InterSystems Caché
Weakness CWE-121
Published September 16, 2025
Last update May 15, 2026

CVSS base score

9.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

What the vulnerability does

01Description

A stack-based buffer overflow exists in the UtilConfigHome.csp endpoint of InterSystems Caché 2009.1. The vulnerability is triggered by sending a specially crafted HTTP GET request containing an oversized argument to the .csp handler. Due to insufficient bounds checking, the input overflows a stack buffer, allowing an attacker to overwrite control structures and execute arbitrary code. It is unknown if this vulnerability was patched and an affected version range remains undefined.

Key dates

02Disclosure timeline

September 16, 2025 CVE published
May 15, 2026 Record updated