Is CVE-2009-2299 being actively exploited?

CVE-2009-2299 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2009-2299?

CVE-2009-2299 has a CVSS 2.0 base score of 5.0 (MEDIUM).

CVE-2009-2299

MEDIUM · CVSS 5.0EPSS 4.3%EU EUVD

The Artofdefence Hyperguard Web Application Firewall (WAF) module before 2.5.5-11635, 3.0 before 3.0.3-11636, and 3.1 before 3.1.1-11637, a module for the Apache HTTP Server, allows remote attackers to cause a denial of service (memory consumption) via an HTTP request with a large Content-Length value but no POST data.

Key facts

CVSS score: 5.0 (v2.0)
Severity: MEDIUM
CVSS vector: AV:N/AC:L/Au:N/C:N/I:N/A:P
EPSS score: 4.3% (91th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2009-2295)
Published: July 2, 2009
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2009-2295 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.

View on the EU Vulnerability Database

Affected products

apache / http server
hyperguard web application firewall project / hyperguard web application firewall

References

http://secunia.com/advisories/35645(Third Party Advisory)
http://www.h4ck1nb3rg.at/wafs/advisory_artofdefence_hyperguard_200907.txt(Broken Link)
http://www.securityfocus.com/archive/1/504680/100/0/threaded(Third Party Advisory, VDB Entry)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

Query CVEs from your AI assistant

The CVE/NVD Explorer brain answers CVE questions directly inside Claude, ChatGPT, or any MCP assistant — always up to date, no setup. Add it once and stop pasting advisories into chat.

Add the CVE brain