What is CVE-2016-6594?

CVE-2016-6594 is a high-severity vulnerability in Bluecoat Advanced Secure Gateway, classified under CWE-254. CVSS score: 7.5/10. Published 2017-06-08.

How severe is CVE-2016-6594?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Bluecoat Advanced Secure Gateway

CVE-2016-6594

Blue Coat Advanced Secure Gateway 6.6, CacheFlow 3.4, ProxySG 6.5 and 6.6 allows remote attackers to bypass blocked requests, user authentication, and payload scanning.

Published 2017-06-08 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.013 (69.3th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 69th percentile — 69.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000

Affected products

Bluecoat Advanced Secure Gateway — versions 6.6
Bluecoat Cacheflow — versions 3.4
Bluecoat Proxysg — versions 6.5, 6.6

Weakness classification (CWE)

CWE-254

References

www.securityfocus.com/bid/91404 (vdb-entry)
bto.bluecoat.com/security-advisory/sa130 (Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2016-6594?: CVE-2016-6594 is a high-severity vulnerability in Bluecoat Advanced Secure Gateway, classified under CWE-254. CVSS score: 7.5/10. Published 2017-06-08.
How severe is CVE-2016-6594?: High severity. CVSS v3 base score is 7.5 out of 10.