CVE-2015-2855: The WebUI component in Blue Coat SSL Visibility Appliance SV800, SV1800, SV2800, and SV3800 3.6.x through 3.8.

Q: How do I fix CVE-2015-2855?

ssl visibility appliance sv800 firmware: upgrade to newer than 3.8.3; ssl visibility appliance sv1800 firmware: upgrade to newer than 3.8.3; ssl visibility appliance sv3800 firmware: upgrade to newer than 3.8.3. Exact commands for each OS are on this page.

Q: Is CVE-2015-2855 being exploited?

CVE-2015-2855 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-2015-2855 affect?

CVE-2015-2855 affects ssl visibility appliance sv800 firmware, ssl visibility appliance sv1800 firmware, ssl visibility appliance sv3800 firmware. Severity is medium (CVSS 4.3). The WebUI component in Blue Coat SSL Visibility Appliance SV800, SV1800, SV2800, and SV3800 3.6.x through 3.8.x before 3.8.4 does not set the secure flag for the administrator's cookie in an https session, which makes it easier for remote a

Q: How urgent is CVE-2015-2855?

Priority 33/100. No elevated risk signals yet.

Routine

MEDIUM 4.3UPGRADEUPGRADEUPGRADE

CVE-2015-2855 is a medium-severity flaw (CVSS 4.3) affecting ssl visibility appliance sv800 firmware, ssl visibility appliance sv1800 firmware, ssl visibility appliance sv3800 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The WebUI component in Blue Coat SSL Visibility Appliance SV800, SV1800, SV2800, and SV3800 3.6.x through 3.8.x before 3.8.4 does not set the secure flag for the administrator's cookie in an https session, which makes it easier for remote attackers to capture this cookie by intercepting its transmission within an http session, a different vulnerability than CVE-2015-4138.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	4.3 (Medium)
EPSS exploit chance	1.4% (top 27%)
CISA exploited list	No
Weakness	CWE-200
Published	2015-05-30
Last modified	2026-06-17

Publisher (CNA): CERT/CC · Vendor: blue coat

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2015-05-30 19:59 UTCPublished CVE record published
2026-06-17 00:24 UTCUpdated Record last modified

blue coat ssl visibility appliance sv800 firmware UPGRADE

Affected: <= 3.8.3

Fixed in: newer than 3.8.3

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.

blue coat ssl visibility appliance sv1800 firmware UPGRADE

Affected: <= 3.8.3

Fixed in: newer than 3.8.3

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.

blue coat ssl visibility appliance sv3800 firmware UPGRADE

Affected: <= 3.8.3

Fixed in: newer than 3.8.3

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.

blue coat ssl visibility appliance sv2800 firmware UPGRADE

Affected: <= 3.8.3

Fixed in: newer than 3.8.3

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.

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-2015-2855?

ssl visibility appliance sv800 firmware: upgrade to newer than 3.8.3; ssl visibility appliance sv1800 firmware: upgrade to newer than 3.8.3; ssl visibility appliance sv3800 firmware: upgrade to newer than 3.8.3. Exact commands for each OS are on this page.

Is CVE-2015-2855 being exploited?

CVE-2015-2855 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-2015-2855 affect?

CVE-2015-2855 affects ssl visibility appliance sv800 firmware, ssl visibility appliance sv1800 firmware, ssl visibility appliance sv3800 firmware. Severity is medium (CVSS 4.3). The WebUI component in Blue Coat SSL Visibility Appliance SV800, SV1800, SV2800, and SV3800 3.6.x through 3.8.x before 3.8.4 does not set the secure flag for the administrator's cookie in an https session, which makes it easier for remote a

How urgent is CVE-2015-2855?

Priority 33/100. No elevated risk signals yet.

Related CVEs

CVE-2016-10259 MEDIUM 5.9 MITIGATE MITIGATE Symantec SSL Visibility (SSLV) 3.8.4FC, 3.9, 3.10 before 3.10.4.1, and 3.11 before 3.11.3.1 is susceptible to
CVE-2015-4138 MEDIUM 4.3 UPGRADE UPGRADE The WebUI component in Blue Coat SSL Visibility Appliance SV800, SV1800, SV2800, and SV3800 3.6.x through 3.8.
CVE-2015-2854 MEDIUM 4.3 UPGRADE UPGRADE The WebUI component in Blue Coat SSL Visibility Appliance SV800, SV1800, SV2800, and SV3800 3.6.x through 3.8.
CVE-2015-2853 MEDIUM 6.8 UPGRADE UPGRADE Session fixation vulnerability in the WebUI component in Blue Coat SSL Visibility Appliance SV800, SV1800, SV2
CVE-2015-2852 MEDIUM 4.3 UPGRADE UPGRADE Cross-site request forgery (CSRF) vulnerability in the WebUI component in Blue Coat SSL Visibility Appliance S

References

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