How severe is CVE-2009-1211?

CVE-2009-1211 has a CVSS 2.0 base score of 5.8, rated medium severity.

Is CVE-2009-1211 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2009-1211?

CVE-2009-1211 primarily affects Bluecoat Proxysg Va-10. In total, 31 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2009-1211?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2009-1211 published?

CVE-2009-1211 was published on 2009-04-01 and last updated on 2026-06-16.

CVE-2009-1211

CVE-2009-1211 is a medium-severity vulnerability in Bluecoat Proxysg Va-10 with a CVSS 2.0 base score of 5.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-16.

Key facts

Severity: Medium (CVSS 2.0 base score 5.8)
EPSS exploit prediction: 1% (68th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-16
Affected product: Bluecoat Proxysg Va-10
Published: 2009-04-01
Last modified: 2026-06-16

Description

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.

Frequently asked questions

What is CVE-2009-1211?: 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.
How severe is CVE-2009-1211?: CVE-2009-1211 has a CVSS 2.0 base score of 5.8, rated medium severity.
Is CVE-2009-1211 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2009-1211?: CVE-2009-1211 primarily affects Bluecoat Proxysg Va-10. In total, 31 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2009-1211?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2009-1211 published?: CVE-2009-1211 was published on 2009-04-01 and last updated on 2026-06-16.

References

Affected products (31)

cpe:2.3:a:bluecoat:proxysg_va-10:*:*:*:*:*:*:*:*
cpe:2.3:a:bluecoat:proxysg_va-15:*:*:*:*:*:*:*:*
cpe:2.3:a:bluecoat:proxysg_va-20:*:*:*:*:*:*:*:*
cpe:2.3:a:bluecoat:proxysg_va-5:*:*:*:*:*:*:*:*
cpe:2.3:h:bluecoat:proxysg:*:*:*:*:*:*:*:*
cpe:2.3:h:bluecoat:proxysg_sg210-10:-:-:acceleration:*:*:*:*:*
cpe:2.3:h:bluecoat:proxysg_sg210-10:-:-:full_proxy:*:*:*:*:*
cpe:2.3:h:bluecoat:proxysg_sg210-25:-:-:acceleration:*:*:*:*:*
cpe:2.3:h:bluecoat:proxysg_sg210-25:-:-:full_proxy:*:*:*:*:*
cpe:2.3:h:bluecoat:proxysg_sg210-5:-:-:acceleration:*:*:*:*:*
cpe:2.3:h:bluecoat:proxysg_sg210-5:-:-:full_proxy:*:*:*:*:*
cpe:2.3:h:bluecoat:proxysg_sg510-10:-:-:acceleration:*:*:*:*:*
cpe:2.3:h:bluecoat:proxysg_sg510-10:-:-:full_proxy:*:*:*:*:*
cpe:2.3:h:bluecoat:proxysg_sg510-20:-:-:acceleration:*:*:*:*:*
cpe:2.3:h:bluecoat:proxysg_sg510-20:-:-:full_proxy:*:*:*:*:*
cpe:2.3:h:bluecoat:proxysg_sg510-25:-:-:acceleration:*:*:*:*:*
cpe:2.3:h:bluecoat:proxysg_sg510-25:-:-:full_proxy:*:*:*:*:*
cpe:2.3:h:bluecoat:proxysg_sg510-5:-:-:full_proxy:*:*:*:*:*
cpe:2.3:h:bluecoat:proxysg_sg810-10:-:-:acceleration:*:*:*:*:*
cpe:2.3:h:bluecoat:proxysg_sg810-10:-:-:full_proxy:*:*:*:*:*
cpe:2.3:h:bluecoat:proxysg_sg810-20:-:-:acceleration:*:*:*:*:*
cpe:2.3:h:bluecoat:proxysg_sg810-20:-:-:full_proxy:*:*:*:*:*
cpe:2.3:h:bluecoat:proxysg_sg810-25:-:-:acceleration:*:*:*:*:*
cpe:2.3:h:bluecoat:proxysg_sg810-25:-:-:full_proxy:*:*:*:*:*
cpe:2.3:h:bluecoat:proxysg_sg810-5:-:-:full_proxy:*:*:*:*:*
cpe:2.3:h:bluecoat:proxysg_sg9000-10:-:-:acceleration:*:*:*:*:*
cpe:2.3:h:bluecoat:proxysg_sg9000-10:-:-:full_proxy:*:*:*:*:*
cpe:2.3:h:bluecoat:proxysg_sg9000-20:-:-:acceleration:*:*:*:*:*
cpe:2.3:h:bluecoat:proxysg_sg9000-20:-:-:full_proxy:*:*:*:*:*
cpe:2.3:h:bluecoat:proxysg_sg9000-5:-:-:acceleration:*:*:*:*:*
cpe:2.3:h:bluecoat:proxysg_sg9000-5:-:-:full_proxy:*:*:*:*:*

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