Is CVE-2009-4500 being actively exploited?

CVE-2009-4500 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2009-4500?

CVE-2009-4500 has a CVSS 2.0 base score of 5.0 (MEDIUM).

CVE-2009-4500

MEDIUM · CVSS 5.0EPSS 2.3%EU EUVD

The process_trap function in trapper/trapper.c in Zabbix Server before 1.6.6 allows remote attackers to cause a denial of service (crash) via a crafted request with data that lacks an expected : (colon) separator, which triggers a NULL pointer dereference.

Key facts

CVSS score: 5.0 (v2.0)
Severity: MEDIUM
CVSS vector: AV:N/AC:L/Au:N/C:N/I:N/A:P
Weakness (CWE): CWE-119
EPSS score: 2.3% (83th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2009-4466)
Published: December 31, 2009
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2009-4466 in the EU Vulnerability Database. Last updated in EUVD on September 17, 2024.

View on the EU Vulnerability Database

Affected products

zabbix / zabbix
zabbix / zabbix
zabbix / zabbix
zabbix / zabbix
zabbix / zabbix
zabbix / zabbix
zabbix / zabbix
zabbix / zabbix

References

http://secunia.com/advisories/37740(Vendor Advisory)
http://www.securityfocus.com/archive/1/508436/30/60/threaded
http://www.vupen.com/english/advisories/2009/3514(Vendor Advisory)
https://support.zabbix.com/browse/ZBX-993(Vendor Advisory)

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

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