How severe is CVE-2007-4405?

CVE-2007-4405 has a CVSS 2.0 base score of 7.8, rated high severity.

Is CVE-2007-4405 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2007-4405?

CVE-2007-4405 primarily affects Universal Ircd Ircu. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2007-4405?

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-2007-4405 published?

CVE-2007-4405 was published on 2007-08-18 and last updated on 2026-06-16.

CVE-2007-4405

CVE-2007-4405 is a high-severity vulnerability in Universal Ircd Ircu with a CVSS 2.0 base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 2.0 base score 7.8)
EPSS exploit prediction: 2% (74th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Universal Ircd Ircu
Published: 2007-08-18
Last modified: 2026-06-16

Description

ircu 2.10.12.02 through 2.10.12.04 allows remote attackers to cause a denial of service (memory and bandwidth consumption) by creating a large number of unused channels (zannels).

Frequently asked questions

What is CVE-2007-4405?: ircu 2.10.12.02 through 2.10.12.04 allows remote attackers to cause a denial of service (memory and bandwidth consumption) by creating a large number of unused channels (zannels).
How severe is CVE-2007-4405?: CVE-2007-4405 has a CVSS 2.0 base score of 7.8, rated high severity.
Is CVE-2007-4405 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2007-4405?: CVE-2007-4405 primarily affects Universal Ircd Ircu. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2007-4405?: 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-2007-4405 published?: CVE-2007-4405 was published on 2007-08-18 and last updated on 2026-06-16.

References

Affected products (3)

cpe:2.3:a:universal_ircd:ircu:2.10.12.02:*:*:*:*:*:*:*
cpe:2.3:a:universal_ircd:ircu:2.10.12.03:*:*:*:*:*:*:*
cpe:2.3:a:universal_ircd:ircu:2.10.12.04:*:*:*:*:*:*:*

More vulnerabilities in Universal Ircd Ircu

CVE-2007-4404 — High (CVSS 7.8): ircu 2.10.12.01 allows remote attackers to (1) cause a denial of service (flood wallops) by joining two channels with…
CVE-2007-4406 — High (CVSS 7.5): ircu 2.10.12.01 through 2.10.12.04 does not remove ops privilege after a join from a server with an older timestamp…
CVE-2007-4407 — Medium (CVSS 6.4): ircu 2.10.12.03 and 2.10.12.04 does not associate a timestamp with ops privilege on an unused channel (zannel), which…
CVE-2007-4410 — Medium (CVSS 6.0): ircu 2.10.12.05 and earlier does not properly synchronize a kick action in certain cross scenarios, which allows remote…
CVE-2007-4409 — Medium (CVSS 5.1): Race condition in ircu 2.10.12.01 through 2.10.12.05 allows remote attackers to set a new Apass during a netburst by…
CVE-2007-4408 — Medium (CVSS 5.0): ircu 2.10.12.05 and earlier ignores timestamps in bounces, which allows remote attackers to take over a channel during…

All CVEs affecting Universal Ircd Ircu →