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Fencer Vulns
critical 9.3

CVE-2003-1336 in the critical feed json

Buffer overflow in mIRC before 6.11 allows remote attackers to execute arbitrary code via a long irc:// URL.

published 2003-12-31 22 y ago modified 2026-06-16 4 mo ago also EUVD-2003-1326

cvss
9.3
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
35.7%
EPSS 35.7% chance of exploitation in 30 days, percentile 98%
public exploits
3
Metasploit, Exploit-DB

Summary

Buffer overflow in mIRC before 6.11 allows remote attackers to execute arbitrary code via a long irc:// URL.

Patch / fix

Timeline

  1. First public exploit (Metasploit exploit/windows/browser/mirc_irc_url)
  2. Published

Exploit prediction

35.71% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

CVSS scores

assigned by version score vector
NVD 2.0 9.3 AV:N/AC:M/Au:N/C:C/I:C/A:C

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

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.