CVE-2009-0803

SmoothWall SmoothGuardian, as used in SmoothWall Firewall, NetworkGuardian, and SchoolGuardian 2008, when transparent interception mode is enabled, uses the HTTP Host header to determine the remote endpoint, which allows remote attackers to bypass access controls for Flash, Java, Silverlight, and probably other technologies, and possibly communicate with restricted intranet sites, via a crafted web page that causes a client to send HTTP requests with a modified Host header.

Published: 2009-03-04 Last update: 2026-04-23 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2009-0803 is rated Moderate Risk (49.3/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.22%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2009-0803

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-11-17 0.97% 1.22% +0.25%
2 2025-09-03 0.28% 0.97% +0.69%
3 2025-03-17 — 0.28% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2009-0803

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.4 2.0 MEDIUM
AV:N/AC:H/Au:N/C:C/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:H)
Exploitation requires uncommon or highly specific conditions.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 4.9 6.9 [email protected]

Weakness enumeration for CVE-2009-0803

Affected software / configurations for CVE-2009-0803

Vendor Product Version Raw CPE
smoothwall networkguardian 2008 cpe:2.3:a:smoothwall:networkguardian:2008:*:*:*:*:*:*:*
smoothwall schoolguardian 2008 cpe:2.3:a:smoothwall:schoolguardian:2008:*:*:*:*:*:*:*
smoothwall smoothguardian 2008 cpe:2.3:a:smoothwall:smoothguardian:2008:*:*:*:*:*:*:*

References for CVE-2009-0803

cvelogic Threat Intelligence