Is CVE-2006-6811 being actively exploited?

CVE-2006-6811 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2006-6811?

CVE-2006-6811 has a CVSS 3.1 base score of 6.5 (MEDIUM).

CVE-2006-6811

MEDIUM · CVSS 6.5EPSS 10.6%EU EUVD

KsIRC 1.3.12 allows remote attackers to cause a denial of service (crash) via a long PRIVMSG string when connecting to an Internet Relay Chat (IRC) server, which causes an assertion failure and results in a NULL pointer dereference. NOTE: this issue was originally reported as a buffer overflow.

Key facts

CVSS score: 6.5 (v3.1)
Severity: MEDIUM
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-617
EPSS score: 10.6% (96th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2006-6794)
Published: December 29, 2006
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2006-6794 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.

View on the EU Vulnerability Database

Affected products

canonical / ubuntu linux
canonical / ubuntu linux
canonical / ubuntu linux
kde / ksirc

References

http://osvdb.org/33443(Broken Link)
http://security.gentoo.org/glsa/glsa-200701-26.xml(Third Party Advisory)
http://securitytracker.com/id?1017453(Broken Link, Third Party Advisory, VDB Entry)
http://www.addict3d.org/index.php?page=viewarticle&trace=0&type=security&ID=8468(Broken Link)
http://www.kde.org/info/security/advisory-20070109-1.txt(Third Party Advisory)
http://www.mandriva.com/security/advisories?name=MDKSA-2007:009(Broken Link)
http://www.securityfocus.com/archive/1/456379/100/0/threaded(Broken Link, Third Party Advisory, VDB Entry)
http://www.securityfocus.com/bid/21790(Broken Link, Exploit, Third Party Advisory, VDB Entry)
http://www.ubuntu.com/usn/usn-409-1(Third Party Advisory)
http://www.vupen.com/english/advisories/2006/5199(Broken Link)
https://exchange.xforce.ibmcloud.com/vulnerabilities/31134(Third Party Advisory, VDB Entry)
https://issues.rpath.com/browse/RPL-922(Broken Link)
https://www.exploit-db.com/exploits/3023(Exploit, Third Party Advisory, VDB Entry)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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