How severe is CVE-2009-0545?

CVE-2009-0545 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-2009-0545 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 91% (100th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-0545?

CVE-2009-0545 primarily affects Zeroshell. In total, 11 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-0545?

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.

When was CVE-2009-0545 published?

CVE-2009-0545 was published on 2009-02-12 and last updated on 2026-06-16.

CVE-2009-0545

CVE-2009-0545 is a critical-severity vulnerability in Zeroshell with a CVSS 2.0 base score of 10.0. Its EPSS exploit-prediction score of 91% places it in the 100th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-20.

Key facts

Severity: Critical (CVSS 2.0 base score 10.0)
EPSS exploit prediction: 91% (100th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Zeroshell
Published: 2009-02-12
Last modified: 2026-06-16

Description

cgi-bin/kerbynet in ZeroShell 1.0beta11 and earlier allows remote attackers to execute arbitrary commands via shell metacharacters in the type parameter in a NoAuthREQ x509List action.

Frequently asked questions

What is CVE-2009-0545?: cgi-bin/kerbynet in ZeroShell 1.0beta11 and earlier allows remote attackers to execute arbitrary commands via shell metacharacters in the type parameter in a NoAuthREQ x509List action.
How severe is CVE-2009-0545?: CVE-2009-0545 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-2009-0545 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 91% (100th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-0545?: CVE-2009-0545 primarily affects Zeroshell. In total, 11 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-0545?: 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.
When was CVE-2009-0545 published?: CVE-2009-0545 was published on 2009-02-12 and last updated on 2026-06-16.

References

Affected products (11)

cpe:2.3:a:zeroshell:zeroshell:1.0:beta1:*:*:*:*:*:*
cpe:2.3:a:zeroshell:zeroshell:1.0:beta10:*:*:*:*:*:*
cpe:2.3:a:zeroshell:zeroshell:1.0:beta11:*:*:*:*:*:*
cpe:2.3:a:zeroshell:zeroshell:1.0:beta2:*:*:*:*:*:*
cpe:2.3:a:zeroshell:zeroshell:1.0:beta3:*:*:*:*:*:*
cpe:2.3:a:zeroshell:zeroshell:1.0:beta4:*:*:*:*:*:*
cpe:2.3:a:zeroshell:zeroshell:1.0:beta5:*:*:*:*:*:*
cpe:2.3:a:zeroshell:zeroshell:1.0:beta6:*:*:*:*:*:*
cpe:2.3:a:zeroshell:zeroshell:1.0:beta7:*:*:*:*:*:*
cpe:2.3:a:zeroshell:zeroshell:1.0:beta8:*:*:*:*:*:*
cpe:2.3:a:zeroshell:zeroshell:1.0:beta9:*:*:*:*:*:*

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