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).

Published: 2007-08-18 Last update: 2026-04-23 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2007-4405 is rated Moderate Risk (57.7/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.88%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2007-4405

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-04-06 0.73% 0.88% +0.16%
2 2025-03-30 0.60% 0.73% +0.13%
3 2025-03-29 — 0.60% —

Full EPSS history (11 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2007-4405

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.8 2.0 HIGH
AV:N/AC:L/Au:N/C:N/I:N/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:C)
Complete availability impact.
 10.0 6.9 [email protected]

Weakness enumeration for CVE-2007-4405

OS Trackers for CVE-2007-4405

vendor priority summary link
debian unimportant CVE-2007-4405 unimportant priority: Debian including 1 source packages (ircd-ircu), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2007-4405
ubuntu medium CVE-2007-4405 medium priority: Ubuntu including 1 source packages (ircd-ircu), 5 status rows across 5 suites (dapper, edgy, feisty, gutsy, upstream): not-affected 4, released 1. https://ubuntu.com/security/CVE-2007-4405

Affected software / configurations for CVE-2007-4405

Vendor Product Version Raw CPE
universal_ircd ircu 2.10.12.02 cpe:2.3:a:universal_ircd:ircu:2.10.12.02:*:*:*:*:*:*:*
universal_ircd ircu 2.10.12.03 cpe:2.3:a:universal_ircd:ircu:2.10.12.03:*:*:*:*:*:*:*
universal_ircd ircu 2.10.12.04 cpe:2.3:a:universal_ircd:ircu:2.10.12.04:*:*:*:*:*:*:*

References for CVE-2007-4405

cvelogic Threat Intelligence