Which products and versions are affected by CVE-2005-4085?

Affected: Webproxy (Bluecoat) versions 4.0-r1a, 4.0-r1b, 4.0-r1c, 4.0-r1e, 4.0-r1f, 4.0-r1h, 4.0-r1k, 4.0-r1m; Proxyav (Bluecoat). The full list is in the CVE brief.

Is CVE-2005-4085 being exploited in the wild?

It is not listed in any known-exploited vulnerabilities catalog.

Is CVE-2005-4085 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-2005-4085?

Public exploit code is available.

Is there a fix for CVE-2005-4085?

No fixed version is listed yet; check the vendor advisory for mitigations.

How urgently should CVE-2005-4085 be patched?

Brandefense priority: patch immediately, because it is very likely to be exploited soon.

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Vulnerability Intelligence

CVE-2005-4085

HighPublic exploit

Buffer overflow in BlueCoat (a) WinProxy before 6.1a and (b) the web console access functionality in ProxyAV before 2.4.2.3 allows remote attackers to execute arbitrary code via a long Host: header.

Published Dec 31, 2005 · Updated Apr 15, 2026

Key Facts

Patch immediately

CVE-2005-4085 is a high-severity vulnerability (CVSS 7.5 v2) affecting Webproxy (Bluecoat), Proxyav (Bluecoat).
It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
EPSS estimates a 66% probability of exploitation in the next 30 days.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.

CVSS v2

7.5

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

EPSS (30-day exploit likelihood)

66%

Higher than 99.2% of all scored CVEs

Exploited in the wild

No known

Not in a known-exploited catalog

Public exploit code

Available

Proof-of-concept or weaponized module

Get the full CVE-2005-4085 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

Description

Buffer overflow in BlueCoat (a) WinProxy before 6.1a and (b) the web console access functionality in ProxyAV before 2.4.2.3 allows remote attackers to execute arbitrary code via a long Host: header.

Affected Products

20 affected entries in total

Product	Affected versions	Fixed in
WebproxyBluecoat	4.0-r1a, 4.0-r1b, 4.0-r1c, 4.0-r1e, 4.0-r1f, 4.0-r1h, 4.0-r1k, 4.0-r1m	n/a
ProxyavBluecoat	See advisory	n/a

Timeline

Publicly disclosed
Dec 31, 2005
Last updated
Apr 15, 2026

References

6 more references in the full CVE brief

FAQ

Common Questions.

Buffer overflow in BlueCoat (a) WinProxy before 6.1a and (b) the web console access functionality in ProxyAV before 2.4.2.3 allows remote attackers to execute arbitrary code via a long Host: header.
Affected: Webproxy (Bluecoat) versions 4.0-r1a, 4.0-r1b, 4.0-r1c, 4.0-r1e, 4.0-r1f, 4.0-r1h, 4.0-r1k, 4.0-r1m; Proxyav (Bluecoat). The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.

Is CVE-2005-4085 Running On Your Attack Surface?

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