How severe is CVE-2009-4500?

CVE-2009-4500 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2009-4500 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-4500?

CVE-2009-4500 primarily affects Zabbix. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-4500?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2009-4500 published?

CVE-2009-4500 was published on 2009-12-31 and last updated on 2026-06-16.

CVE-2009-4500

CVE-2009-4500 is a medium-severity vulnerability in Zabbix with a CVSS 2.0 base score of 5.0. 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-119.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 2% (81st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Zabbix
Published: 2009-12-31
Last modified: 2026-06-16

Description

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.

Frequently asked questions

What is CVE-2009-4500?: 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.
How severe is CVE-2009-4500?: CVE-2009-4500 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2009-4500 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-4500?: CVE-2009-4500 primarily affects Zabbix. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-4500?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-4500 published?: CVE-2009-4500 was published on 2009-12-31 and last updated on 2026-06-16.

References

Affected products (8)

cpe:2.3:a:zabbix:zabbix:*:*:*:*:*:*:*:*
cpe:2.3:a:zabbix:zabbix:1.1.2:*:*:*:*:*:*:*
cpe:2.3:a:zabbix:zabbix:1.1.3:*:*:*:*:*:*:*
cpe:2.3:a:zabbix:zabbix:1.1.4:*:*:*:*:*:*:*
cpe:2.3:a:zabbix:zabbix:1.1.5:*:*:*:*:*:*:*
cpe:2.3:a:zabbix:zabbix:1.4.2:*:*:*:*:*:*:*
cpe:2.3:a:zabbix:zabbix:1.4.3:*:*:*:*:*:*:*
cpe:2.3:a:zabbix:zabbix:1.4.4:*:*:*:*:*:*:*

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