CVE-2011-5124

Exp

Stack-based buffer overflow in the BCAAA component before build 60258, as used by Blue Coat ProxySG 4.2.3 through 6.1 and ProxyOne, allows remote attackers to execute arbitrary code via a large packet to the synchronization port (16102/tcp).

Published: 2012-08-26 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2011-5124 is rated High Exploit Risk (86.1/100): CVSS Critical severity, with high exploitation likelihood (EPSS 70.25%, 99th percentile). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2011-5124

EDB-ID Source Kind Published Link
17513 exploit_db edb 2011-07-09 Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2011-5124

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-03-30 73.64% 70.25% -3.39%
2 2025-03-29 70.25% 73.64% +3.39%
3 2025-03-17 — 70.25% —

Full EPSS history (22 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-5124

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
10.0 2.0 HIGH
AV:N/AC:L/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 10.0 10.0 [email protected]

Weakness enumeration for CVE-2011-5124

Affected software / configurations for CVE-2011-5124

Vendor Product Version Raw CPE
bluecoat proxyone — cpe:2.3:a:bluecoat:proxyone:*:*:*:*:*:*:*:*
bluecoat proxysg 4.2.6 cpe:2.3:a:bluecoat:proxysg:4.2.6:*:*:*:*:*:*:*
bluecoat proxysg 4.3.2.3 cpe:2.3:a:bluecoat:proxysg:4.3.2.3:*:*:*:*:*:*:*
bluecoat proxysg 5.1 cpe:2.3:a:bluecoat:proxysg:5.1:*:*:*:*:*:*:*
bluecoat proxysg 5.1.6.1 cpe:2.3:a:bluecoat:proxysg:5.1.6.1:*:*:*:*:*:*:*
bluecoat proxysg 5.2 cpe:2.3:a:bluecoat:proxysg:5.2:*:*:*:*:*:*:*
bluecoat proxysg 5.2.2.4 cpe:2.3:a:bluecoat:proxysg:5.2.2.4:*:*:*:*:*:*:*
bluecoat proxysg 5.2.5.2 cpe:2.3:a:bluecoat:proxysg:5.2.5.2:*:*:*:*:*:*:*
bluecoat proxysg 5.3 cpe:2.3:a:bluecoat:proxysg:5.3:*:*:*:*:*:*:*
bluecoat proxysg 5.3.2.1 cpe:2.3:a:bluecoat:proxysg:5.3.2.1:*:*:*:*:*:*:*
bluecoat proxysg 5.4 cpe:2.3:a:bluecoat:proxysg:5.4:*:*:*:*:*:*:*
bluecoat proxysg 5.4.1.1 cpe:2.3:a:bluecoat:proxysg:5.4.1.1:*:*:*:*:*:*:*
bluecoat proxysg 6 cpe:2.3:h:bluecoat:proxysg:6:*:*:*:*:*:*:*

References for CVE-2011-5124

cvelogic Threat Intelligence