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CVE-2015-4334

16
FAUCET Score

CVE-2015-4334 describes an information disclosure vulnerability in Blue Coat ProxySG firmware versions prior to 6.2.16.5, 6.5.7.1, and 6.6.2.1. The default configuration in explicit proxy deployments forwards authentication challenges from upstream servers, specifically 407 Proxy Authentication Required HTTP status codes, making it easier for attackers to obtain sensitive information, such as NTLM hashes. This vulnerability has a CVSS score of 5.0, indicating a medium severity, with low attack complexity and potential for partial confidentiality impact. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 6.2, <= 6.2.16.4CPE matchmatch criteria
cpe:2.3:o:symantec:proxysg_firmware:*:*:*:*:*:*:*:*
>= 6.5, <= 6.5.7.0CPE matchmatch criteria
cpe:2.3:o:symantec:proxysg_firmware:*:*:*:*:*:*:*:*
>= 6.6, <= 6.6.2.0CPE matchmatch criteria
cpe:2.3:o:symantec:proxysg_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

AV:N/AC:L/Au:N/C:P/I:N/A:N

Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
3.33%
Probability of exploitation in next 30 days
EPSS Percentile
87.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0333 is in the 83rd percentile among its peer group of 23,705 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

bto.bluecoat.com / security-advisory/sa93
Vendor Advisory
twitter.com / bugch3ck/status/591492380294979585
Third Party Advisory
securitytracker.com / id/1032149
Third Party AdvisoryVDB Entry