CVE-2009-20005
CVE-2009-20005 is a critical-severity vulnerability with a CVSS 4.0 base score of 9.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-121.
Key facts
- Severity: Critical (CVSS 4.0 base score 9.3)
- EPSS exploit prediction: 1% (66th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2009-5127
- Weakness: CWE-121
- Published:
- Last modified:
Description
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.
Frequently asked questions
- What is CVE-2009-20005?
- 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.
- How severe is CVE-2009-20005?
- CVE-2009-20005 has a CVSS 4.0 base score of 9.3, rated critical severity.
- Is CVE-2009-20005 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (66th percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2009-20005?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- Does CVE-2009-20005 have an EU (EUVD) identifier?
- Yes. CVE-2009-20005 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2009-5127.
- When was CVE-2009-20005 published?
- CVE-2009-20005 was published on 2025-09-16 and last updated on 2026-06-16.
References
- https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/http/intersystems_cache.rb
- https://www.exploit-db.com/exploits/16807
- https://www.intersystems.com/products/cache/
- https://www.juniper.net/us/en/threatlabs/ips-signatures/detail.APP:INTERSYSTEMS-CACHE-OF.html
- https://www.vulncheck.com/advisories/intersystems-cache-stack-buffer-overflow
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