CVE-2011-3486

Exp

Beckhoff TwinCAT 2.11.0.2004 and earlier allows remote attackers to cause a denial of service via a crafted request to UDP port 48899, which triggers an out-of-bounds read.

Published: 2011-09-16 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2011-3486 is rated High Exploit Risk (68/100): CVSS Medium severity, with high exploitation likelihood (EPSS 58.41%, 98th percentile). 2 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-2011-3486

EDB-ID Source Kind Published Link
17835 exploit_db edb 2011-09-14 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2011-3486

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 2026-05-26 59.83% 58.41% -1.41%
2 2026-02-14 59.00% 59.83% +0.83%
3 2026-01-03 — 59.00% —

Full EPSS history (25 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-3486

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/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:L)
Exploitation conditions are straightforward and predictable.
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.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2011-3486

Affected software / configurations for CVE-2011-3486

Vendor Product Version Raw CPE
beckhoff twincat <= 2.11.0.2004 cpe:2.3:a:beckhoff:twincat:*:*:*:*:*:*:*:*
beckhoff twincat 2.7 cpe:2.3:a:beckhoff:twincat:2.7:*:*:*:*:*:*:*
beckhoff twincat 2.8 cpe:2.3:a:beckhoff:twincat:2.8:*:*:*:*:*:*:*
beckhoff twincat 2.9 cpe:2.3:a:beckhoff:twincat:2.9:*:*:*:*:*:*:*
beckhoff twincat 2.10 cpe:2.3:a:beckhoff:twincat:2.10:*:*:*:*:*:*:*

References for CVE-2011-3486

cvelogic Threat Intelligence