How severe is CVE-2007-5715?

CVE-2007-5715 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2007-5715 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2007-5715?

CVE-2007-5715 affects Denyhosts. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2007-5715?

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

When was CVE-2007-5715 published?

CVE-2007-5715 was published on 2007-10-30 and last updated on 2026-06-16.

CVE-2007-5715

CVE-2007-5715 is a medium-severity vulnerability in Denyhosts with a CVSS 2.0 base score of 4.3. 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-16.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 1% (61st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-16
Affected product: Denyhosts
Published: 2007-10-30
Last modified: 2026-06-16

Description

DenyHosts 2.6 processes OpenSSH sshd "not listed in AllowUsers" log messages with an incorrect regular expression that does not match an IP address, which might allow remote attackers to avoid detection and blocking when making invalid login attempts with a username not present in AllowUsers, as demonstrated by the root username, a different vulnerability than CVE-2007-4323.

Frequently asked questions

What is CVE-2007-5715?: DenyHosts 2.6 processes OpenSSH sshd "not listed in AllowUsers" log messages with an incorrect regular expression that does not match an IP address, which might allow remote attackers to avoid detection and blocking when making invalid login attempts with a username not present in AllowUsers, as demonstrated by the root username, a different vulnerability than CVE-2007-4323.
How severe is CVE-2007-5715?: CVE-2007-5715 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2007-5715 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2007-5715?: CVE-2007-5715 affects Denyhosts. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2007-5715?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2007-5715 published?: CVE-2007-5715 was published on 2007-10-30 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:denyhosts:denyhosts:2.6:*:*:*:*:*:*:*

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CVE-2007-4323 — Medium (CVSS 6.8): DenyHosts 2.6 does not properly parse sshd log files, which allows remote attackers to add arbitrary hosts to the…
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