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Fencer Vulns
high 7.5

CVE-2003-0220 in the critical feed json

Buffer overflow in the administrator authentication process for Kerio Personal Firewall (KPF) 2.1.4 and earlier allows remote attackers to…

published 2003-04-29 23 y ago modified 2026-06-16 4 mo ago also EUVD-2003-0215

cvss
7.5
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
69.1%
EPSS 69.1% chance of exploitation in 30 days, percentile 99.3%
public exploits
6
Metasploit, Exploit-DB

Summary

Buffer overflow in the administrator authentication process for Kerio Personal Firewall (KPF) 2.1.4 and earlier allows remote attackers to execute arbitrary code via a handshake packet.

Patch / fix

Timeline

  1. First public exploit (Metasploit exploit/windows/firewall/kerio_auth)
  2. Published

Exploit prediction

69.09% chance of exploitation in the next 30 days, higher than 99.3% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • Metasploit exploit/windows/firewall/kerio_auth Kerio Firewall 2.1.4 Authentication Packet Overflow metasploit exploit, average rank, 2003-04-28
  • EDB-22418 Kerio Personal Firewall 2.1.x - Remote Authentication Packet Buffer Overflow (2) remote, 2003-04-30
  • EDB-22417 Kerio Personal Firewall 2.1.x - Remote Authentication Packet Buffer Overflow (1) dos, 2003-04-28
  • EDB-16465 Kerio Personal Firewall 2.1.4 - Authentication Packet Overflow (Metasploit) remote, 2010-06-15
  • EDB-1537 Kerio Personal Firewall 2.1.4 - Remote Authentication Packet Overflow (Metasploit) remote, 2006-02-28
  • EDB-28 Kerio Personal Firewall 2.1.4 - Remote Code Execution remote, 2003-05-08
  • coresecurity.com http://www.coresecurity.com/common/showdoc.php?idx=314&idxseccion=10 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

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.