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Fencer Vulns
medium 6.5

CVE-2006-6811 json

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 Ch…

published 2006-12-29 19 y ago modified 2026-06-16 4 mo ago also EUVD-2006-6794

cvss
6.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
10.6%
EPSS 10.6% chance of exploitation in 30 days, percentile 95%
public exploits
1
Exploit-DB

Summary

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.

Timeline

  1. First public exploit (EDB-3023)
  2. Published

Exploit prediction

10.57% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-3023 KsIRC 1.3.12 - 'PRIVMSG' Remote Buffer Overflow (PoC) dos, 2006-12-26
  • securityfocus.com http://www.securityfocus.com/bid/21790 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:N/A:P

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.