CVE-2011-5126: 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

Routine

MEDIUM 5.0MITIGATE

CVE-2011-5126 is a medium-severity flaw (CVSS 5.0) affecting sgos. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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, which allows context-dependent attackers to obtain sensitive authentication information by leveraging read access to a downloaded core file.

Why this priority

No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	1.1% (top 35%)
CISA exploited list	No
Weakness	CWE-200
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 23:35 UTCUpdated Record last modified

bluecoat sgos MITIGATE

Affected: 6.1 · 6.1.1.1 · 6.1.2 · 6.1.2.1 · 6.2.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.1

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.

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-2011-5126?

sgos: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2011-5126 being exploited?

CVE-2011-5126 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-2011-5126 affect?

CVE-2011-5126 affects sgos. Severity is medium (CVSS 5.0). 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, which allows context-dependent attackers to obtain sensitive authentication information by leveraging read access to a downloaded c

How urgent is CVE-2011-5126?

Priority 34/100. No elevated risk signals yet.

Related CVEs

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-2010-5190 MEDIUM 5.0 UPGRADE MITIGATE The Active Content Transformation functionality in Blue Coat ProxySG before SGOS 4.3.4.2, 5.x before SGOS 5.4.
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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