CVE-2009-1211: Bluecoat Proxysg

Medium severity, CVSS 5.8. EPSS: 1.4% chance of exploitation in the next 30 days.

Blue Coat ProxySG, 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.

Affected products

• Bluecoat Proxysg: any version
• Bluecoat Proxysg SG210-10: affected versions not specified
• Bluecoat Proxysg SG210-25: affected versions not specified
• Bluecoat Proxysg SG210-5: affected versions not specified
• Bluecoat Proxysg SG510-10: affected versions not specified
• Bluecoat Proxysg SG510-20: affected versions not specified
• Bluecoat Proxysg SG510-25: affected versions not specified
• Bluecoat Proxysg SG510-5: affected versions not specified
• Bluecoat Proxysg SG810-10: affected versions not specified
• Bluecoat Proxysg SG810-20: affected versions not specified
• Bluecoat Proxysg SG810-25: affected versions not specified
• Bluecoat Proxysg SG810-5: affected versions not specified
• Bluecoat Proxysg SG9000-10: affected versions not specified
• Bluecoat Proxysg SG9000-20: affected versions not specified
• Bluecoat Proxysg SG9000-5: affected versions not specified
• Bluecoat Proxysg Va-10: any version
• Bluecoat Proxysg Va-15: any version
• Bluecoat Proxysg Va-20: any version
• Bluecoat Proxysg Va-5: any version

Published 2009-04-01. Last modified 2026-06-16.