CVE-2011-4520

Exp

Heap-based buffer overflow in an ActiveX component in MICROSYS PROMOTIC before 8.1.5 allows remote attackers to cause a denial of service via a crafted web page.

Published: 2013-05-23 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2011-4520 is rated Exploit Available (55.7/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 2.34%). 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-2011-4520

EDB-ID Source Kind Published Link
18049 exploit_db edb 2011-10-13 Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2011-4520

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 2026-06-15 12.34% 2.34% -10.00%
2 2026-04-25 8.54% 12.34% +3.79%
3 2025-03-30 — 8.54% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-4520

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2011-4520

Affected software / configurations for CVE-2011-4520

Vendor Product Version Raw CPE
microsys promotic <= 8.1.4 cpe:2.3:a:microsys:promotic:*:*:*:*:*:*:*:*
microsys promotic 8.0.0 cpe:2.3:a:microsys:promotic:8.0.0:*:*:*:*:*:*:*
microsys promotic 8.0.1 cpe:2.3:a:microsys:promotic:8.0.1:*:*:*:*:*:*:*
microsys promotic 8.0.2 cpe:2.3:a:microsys:promotic:8.0.2:*:*:*:*:*:*:*
microsys promotic 8.0.3 cpe:2.3:a:microsys:promotic:8.0.3:*:*:*:*:*:*:*
microsys promotic 8.0.4 cpe:2.3:a:microsys:promotic:8.0.4:*:*:*:*:*:*:*
microsys promotic 8.0.5 cpe:2.3:a:microsys:promotic:8.0.5:*:*:*:*:*:*:*
microsys promotic 8.0.6 cpe:2.3:a:microsys:promotic:8.0.6:*:*:*:*:*:*:*
microsys promotic 8.0.7 cpe:2.3:a:microsys:promotic:8.0.7:*:*:*:*:*:*:*
microsys promotic 8.0.8 cpe:2.3:a:microsys:promotic:8.0.8:*:*:*:*:*:*:*
microsys promotic 8.0.9 cpe:2.3:a:microsys:promotic:8.0.9:*:*:*:*:*:*:*
microsys promotic 8.0.10 cpe:2.3:a:microsys:promotic:8.0.10:*:*:*:*:*:*:*
microsys promotic 8.0.11 cpe:2.3:a:microsys:promotic:8.0.11:*:*:*:*:*:*:*
microsys promotic 8.0.12 cpe:2.3:a:microsys:promotic:8.0.12:*:*:*:*:*:*:*
microsys promotic 8.0.13 cpe:2.3:a:microsys:promotic:8.0.13:*:*:*:*:*:*:*
microsys promotic 8.1.0 cpe:2.3:a:microsys:promotic:8.1.0:*:*:*:*:*:*:*
microsys promotic 8.1.1 cpe:2.3:a:microsys:promotic:8.1.1:*:*:*:*:*:*:*
microsys promotic 8.1.2 cpe:2.3:a:microsys:promotic:8.1.2:*:*:*:*:*:*:*
microsys promotic 8.1.3 cpe:2.3:a:microsys:promotic:8.1.3:*:*:*:*:*:*:*

References for CVE-2011-4520

cvelogic Threat Intelligence