Buffer overflow in the administrator authentication process for Kerio Personal Firewall…
Priority HIGH 70Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Partial · Partial · Partial
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
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.
Why it matters now
EPSS 0.6909 99th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 5
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:kerio:personal_firewall_2:2.1:*:*:*:*:*:*:* | 2.1 | Vulnerable | Kerio |
| cpe:2.3:a:kerio:personal_firewall_2:2.1.1:*:*:*:*:*:*:* | 2.1.1 | Vulnerable | Kerio |
| cpe:2.3:a:kerio:personal_firewall_2:2.1.2:*:*:*:*:*:*:* | 2.1.2 | Vulnerable | Kerio |
| cpe:2.3:a:kerio:personal_firewall_2:2.1.3:*:*:*:*:*:*:* | 2.1.3 | Vulnerable | Kerio |
| cpe:2.3:a:kerio:personal_firewall_2:2.1.4:*:*:*:*:*:*:* | 2.1.4 | Vulnerable | Kerio |
- cpe:2.3:a:kerio:personal_firewall_2:2.1:*:*:*:*:*:*:* Versions 2.1 Vulnerable ·Kerio
- cpe:2.3:a:kerio:personal_firewall_2:2.1.1:*:*:*:*:*:*:* Versions 2.1.1 Vulnerable ·Kerio
- cpe:2.3:a:kerio:personal_firewall_2:2.1.2:*:*:*:*:*:*:* Versions 2.1.2 Vulnerable ·Kerio
- cpe:2.3:a:kerio:personal_firewall_2:2.1.3:*:*:*:*:*:*:* Versions 2.1.3 Vulnerable ·Kerio
- cpe:2.3:a:kerio:personal_firewall_2:2.1.4:*:*:*:*:*:*:* Versions 2.1.4 Vulnerable ·Kerio
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2003-0220
- 2026-10-03 Alias added: GHSA-fc26-x4hf-29fm
References
More Kerio Personal Firewall 2 vulnerabilities
- TI-2003-00203 Kerio Personal Firewall (KPF) 2.1.4 and earlier allows remote attackers to execute… CVSS 2.0HIGH 7.5
Sources
- CVE-2003-0220 · CVE Program
- CVE-2003-0220 · NVD
- FIRST EPSS
- GHSA-fc26-x4hf-29fm · GitHub Advisory Database · CC BY 4.0
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