How severe is CVE-1999-0509?

CVE-1999-0509 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-1999-0509 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 33% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-1999-0509?

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-1999-0509 published?

CVE-1999-0509 was published on 1996-05-29 and last updated on 2026-06-16.

CVE-1999-0509

CVE-1999-0509 is a critical-severity vulnerability with a CVSS 2.0 base score of 10.0. Its EPSS exploit-prediction score of 33% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-94.

Key facts

Severity: Critical (CVSS 2.0 base score 10.0)
EPSS exploit prediction: 33% (98th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Published: 1996-05-29
Last modified: 2026-06-16

Description

Perl, sh, csh, or other shell interpreters are installed in the cgi-bin directory on a WWW site, which allows remote attackers to execute arbitrary commands.

Frequently asked questions

What is CVE-1999-0509?: Perl, sh, csh, or other shell interpreters are installed in the cgi-bin directory on a WWW site, which allows remote attackers to execute arbitrary commands.
How severe is CVE-1999-0509?: CVE-1999-0509 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-1999-0509 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 33% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-1999-0509?: 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-1999-0509 published?: CVE-1999-0509 was published on 1996-05-29 and last updated on 2026-06-16.

References

https://exchange.xforce.ibmcloud.com/vulnerabilities/146

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