How severe is CVE-2009-2658?

CVE-2009-2658 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2009-2658 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-2658?

CVE-2009-2658 primarily affects Znc. In total, 13 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-2658?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2009-2658 published?

CVE-2009-2658 was published on 2009-08-04 and last updated on 2026-06-16.

CVE-2009-2658

CVE-2009-2658 is a high-severity vulnerability in Znc with a CVSS 2.0 base score of 7.5. 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-22.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 3% (85th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Znc
Published: 2009-08-04
Last modified: 2026-06-16

Description

Directory traversal vulnerability in ZNC before 0.072 allows remote attackers to overwrite arbitrary files via a crafted DCC SEND request.

Frequently asked questions

What is CVE-2009-2658?: Directory traversal vulnerability in ZNC before 0.072 allows remote attackers to overwrite arbitrary files via a crafted DCC SEND request.
How severe is CVE-2009-2658?: CVE-2009-2658 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2009-2658 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-2658?: CVE-2009-2658 primarily affects Znc. In total, 13 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-2658?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2009-2658 published?: CVE-2009-2658 was published on 2009-08-04 and last updated on 2026-06-16.

References

Affected products (13)

cpe:2.3:a:znc:znc:0.044:*:*:*:*:*:*:*
cpe:2.3:a:znc:znc:0.045:*:*:*:*:*:*:*
cpe:2.3:a:znc:znc:0.047:*:*:*:*:*:*:*
cpe:2.3:a:znc:znc:0.052:*:*:*:*:*:*:*
cpe:2.3:a:znc:znc:0.054:*:*:*:*:*:*:*
cpe:2.3:a:znc:znc:0.056:*:*:*:*:*:*:*
cpe:2.3:a:znc:znc:0.058:*:*:*:*:*:*:*
cpe:2.3:a:znc:znc:0.060:*:*:*:*:*:*:*
cpe:2.3:a:znc:znc:0.062:*:*:*:*:*:*:*
cpe:2.3:a:znc:znc:0.064:*:*:*:*:*:*:*
cpe:2.3:a:znc:znc:0.066:*:*:*:*:*:*:*
cpe:2.3:a:znc:znc:0.068:*:*:*:*:*:*:*
cpe:2.3:a:znc:znc:0.070:*:*:*:*:*:*:*

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