CVE-2016-10259: 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

This month

MEDIUM 5.9REMOTEMITIGATEMITIGATEMITIGATE

CVE-2016-10259 is a medium-severity flaw (CVSS 5.9) affecting ssl visibility appliance sv1800 firmware, ssl visibility appliance sv800 firmware, ssl visibility appliance sv3800 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 a denial-of-service vulnerability that impacts the SSL servers for intercepted SSL connections. A malicious SSL client can, under certain circumstances, temporarily exhaust the TCP connection pool of an SSL server.

Why this priority

Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	5.9 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	1.5% (top 27%)
CISA exploited list	No
Weakness	CWE-399
Published	2017-04-11
Last modified	2026-06-17

Publisher (CNA): Symantec Corporation · Vendor: bluecoat

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

Am I affected?

Timeline

2017-04-11 14:59 UTCPublished CVE record published
2026-06-17 00:39 UTCUpdated Record last modified

bluecoat ssl visibility appliance sv1800 firmware MITIGATE

Affected: 3.8.4 · 3.9 · 3.10 · 3.11 · 3.11.1.1 · 3.11.1.2 · 3.11.2.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.8.4

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 ssl visibility appliance sv800 firmware MITIGATE

Affected: 3.8.4 · 3.9 · 3.10 · 3.11 · 3.11.1.1 · 3.11.1.2 · 3.11.2.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.8.4

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 ssl visibility appliance sv3800 firmware MITIGATE

Affected: 3.8.4 · 3.9 · 3.10 · 3.11 · 3.11.1.1 · 3.11.1.2 · 3.11.2.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.8.4

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 ssl visibility appliance sv2800 firmware MITIGATE

Affected: 3.8.4 · 3.9 · 3.10 · 3.11 · 3.11.1.1 · 3.11.1.2 · 3.11.2.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.8.4

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-2016-10259?

ssl visibility appliance sv1800 firmware: mitigate or apply the listed mitigation; ssl visibility appliance sv800 firmware: mitigate or apply the listed mitigation; ssl visibility appliance sv3800 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2016-10259 being exploited?

CVE-2016-10259 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-2016-10259 affect?

CVE-2016-10259 affects ssl visibility appliance sv1800 firmware, ssl visibility appliance sv800 firmware, ssl visibility appliance sv3800 firmware. Severity is medium (CVSS 5.9). 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 a denial-of-service vulnerability that impacts the SSL servers for intercepted SSL connections. A malicious SSL client can, under

How urgent is CVE-2016-10259?

Priority 44/100. Remotely exploitable, no login, no user action

Software pages

Symantec and Broadcom vulnerabilities

Related CVEs

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-2015-2855 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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