How severe is CVE-2009-0759?

CVE-2009-0759 has a CVSS 2.0 base score of 6.5, rated medium severity.

Is CVE-2009-0759 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-0759?

CVE-2009-0759 primarily affects Znc. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-0759?

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

When was CVE-2009-0759 published?

CVE-2009-0759 was published on 2009-03-03 and last updated on 2026-06-16.

CVE-2009-0759

CVE-2009-0759 is a medium-severity vulnerability in Znc with a CVSS 2.0 base score of 6.5. 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-94.

Key facts

Severity: Medium (CVSS 2.0 base score 6.5)
EPSS exploit prediction: 2% (79th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Znc
Published: 2009-03-03
Last modified: 2026-06-16

Description

Multiple CRLF injection vulnerabilities in webadmin in ZNC before 0.066 allow remote authenticated users to modify the znc.conf configuration file and gain privileges via CRLF sequences in the quit message and other vectors.

Frequently asked questions

What is CVE-2009-0759?: Multiple CRLF injection vulnerabilities in webadmin in ZNC before 0.066 allow remote authenticated users to modify the znc.conf configuration file and gain privileges via CRLF sequences in the quit message and other vectors.
How severe is CVE-2009-0759?: CVE-2009-0759 has a CVSS 2.0 base score of 6.5, rated medium severity.
Is CVE-2009-0759 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-0759?: CVE-2009-0759 primarily affects Znc. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-0759?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-0759 published?: CVE-2009-0759 was published on 2009-03-03 and last updated on 2026-06-16.

References

Affected products (3)

cpe:2.3:a:znc:znc:*:*:*:*:*:*:*:*
cpe:2.3:a:znc:znc:0.056:*:*:*:*:*:*:*
cpe:2.3:a:znc:znc:0.058:*:*:*:*:*:*:*

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