CVE-2003-1491
Kerio Personal Firewall (KPF) 2.1.4 has a default rule to accept incoming packets from DNS (UDP...
Kerio Personal Firewall (KPF) 2.1.4 has a default rule to accept incoming packets from DNS (UDP port 53), which allows remote attackers to bypass the firewall filters via packets with a source port of 53.
Exploit likelihood
What each source reports
NVD Score used
Kerio Personal Firewall (KPF) 2.1.4 has a default rule to accept incoming packets from DNS (UDP port 53), which allows remote attackers to bypass the firewall filters via packets with a source port of 53.
- Record
CVE-2003-1491- CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-16, CWE-94
- Updated
- 2026-11-02
CVE List No score
Kerio Personal Firewall (KPF) 2.1.4 has a default rule to accept incoming packets from DNS (UDP port 53), which allows remote attackers to bypass the firewall filters via packets with a source port of 53.
- Record
CVE-2003-1491- Updated
- 2026-11-02
EUVDEUVD-2003-1481 No score
Kerio Personal Firewall (KPF) 2.1.4 has a default rule to accept incoming packets from DNS (UDP port 53), which allows remote attackers to bypass the firewall filters via packets with a source port of 53.
- Record
EUVD-2003-1481- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-2cwh-mxjx-crhg No score
Kerio Personal Firewall (KPF) 2.1.4 has a default rule to accept incoming packets from DNS (UDP...
Kerio Personal Firewall (KPF) 2.1.4 has a default rule to accept incoming packets from DNS (UDP port 53), which allows remote attackers to bypass the firewall filters via packets with a source port of 53.
- Record
GHSA-2cwh-mxjx-crhg- Weakness
- CWE-94
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2003-1491 is a high vulnerability (CVSS 7.5) in Kerio Personal Firewall, published December 31, 2003. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.37%, the 83rd percentile. No source names a fixed version.