CVE-2010-5190: The Active Content Transformation functionality in Blue Coat ProxySG before SGOS 4.3.4.2, 5.x before SGOS 5.4.

Q: How do I fix CVE-2010-5190?

sgos: upgrade to newer than 4.3.4; proxysg: mitigate or apply the listed mitigation; proxysg sg210-10: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2010-5190 being exploited?

CVE-2010-5190 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2010-5190 affect?

CVE-2010-5190 affects sgos, proxysg, proxysg sg210-10. Severity is medium (CVSS 5.0). The Active Content Transformation functionality in Blue Coat ProxySG before SGOS 4.3.4.2, 5.x before SGOS 5.4.5.1, 5.5 before SGOS 5.5.4.1, and 6.x before SGOS 6.1.2.1 allows remote attackers to bypass JavaScript detection via HTML entities

Q: How urgent is CVE-2010-5190?

Priority 36/100. No elevated risk signals yet.

Routine

MEDIUM 5.0UPGRADEMITIGATEMITIGATE

CVE-2010-5190 is a medium-severity flaw (CVSS 5.0) affecting sgos, proxysg, proxysg sg210-10. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The Active Content Transformation functionality in Blue Coat ProxySG before SGOS 4.3.4.2, 5.x before SGOS 5.4.5.1, 5.5 before SGOS 5.5.4.1, and 6.x before SGOS 6.1.2.1 allows remote attackers to bypass JavaScript detection via HTML entities.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	1.4% (top 27%)
CISA exploited list	No
Weakness	CWE-264
Published	2012-08-26
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: bluecoat

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2012-08-26 19:55 UTCPublished CVE record published
2026-06-16 23:26 UTCUpdated Record last modified

bluecoat sgos UPGRADE

Affected: <= 4.3.4 · 3.2.6 · 4.1.2.1 · 4.2.1.2 · 4.2.1.6 · 4.2.2 · 4.2.2.1 · 4.2.2.2

Fixed in: newer than 4.3.4

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

bluecoat proxysg MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Firmware

Install the latest firmware from the vendor advisory; if none, apply the vendor workaround.

bluecoat proxysg sg210-10 MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Firmware

Install the latest firmware from the vendor advisory; if none, apply the vendor workaround.

bluecoat proxysg sg210-25 MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Firmware

Install the latest firmware from the vendor advisory; if none, apply the vendor workaround.

bluecoat proxysg sg210-5 MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Firmware

Install the latest firmware from the vendor advisory; if none, apply the vendor workaround.

bluecoat proxysg sg510-10 MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Firmware

Install the latest firmware from the vendor advisory; if none, apply the vendor workaround.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2010-5190?

sgos: upgrade to newer than 4.3.4; proxysg: mitigate or apply the listed mitigation; proxysg sg210-10: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2010-5190 being exploited?

CVE-2010-5190 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2010-5190 affect?

CVE-2010-5190 affects sgos, proxysg, proxysg sg210-10. Severity is medium (CVSS 5.0). The Active Content Transformation functionality in Blue Coat ProxySG before SGOS 4.3.4.2, 5.x before SGOS 5.4.5.1, 5.5 before SGOS 5.5.4.1, and 6.x before SGOS 6.1.2.1 allows remote attackers to bypass JavaScript detection via HTML entities

How urgent is CVE-2010-5190?

Priority 36/100. No elevated risk signals yet.

Related CVEs

CVE-2011-5126 MEDIUM 5.0 MITIGATE Blue Coat ProxySG 6.1 before SGOS 6.1.5.1 and 6.2 before SGOS 6.2.2.1 writes the secure heap to core images, w
CVE-2010-5192 MEDIUM 4.3 UPGRADE MITIGATE Cross-site scripting (XSS) vulnerability in the Java Management Console in Blue Coat ProxySG before SGOS 4.3.4
CVE-2010-5189 HIGH 9.3 UPGRADE MITIGATE Blue Coat ProxySG before SGOS 4.3.4.1, 5.x before SGOS 5.4.5.1, 5.5 before SGOS 5.5.4.1, and 6.x before SGOS 6

References

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