CVE-2011-4876

Exp

Directory traversal vulnerability in HmiLoad in the runtime loader in Siemens WinCC flexible 2004, 2005, 2007, and 2008; WinCC V11 (aka TIA portal); the TP, OP, MP, Comfort Panels, and Mobile Panels SIMATIC HMI panels; WinCC V11 Runtime Advanced; and WinCC flexible Runtime, when Transfer Mode is enabled, allows remote attackers to execute, read, create, modify, or delete arbitrary files via a .. (dot dot) in a string.

Published: 2012-02-03 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2011-4876 is rated High Exploit Risk (86.3/100): CVSS Critical severity, with high exploitation likelihood (EPSS 13.36%, 94th percentile). 1 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +1.10% over the last day, indicating growing attacker interest. 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-2011-4876

EDB-ID Source Kind Published Link
18166 exploit_db edb 2011-11-28 Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2011-4876

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 2026-05-23 12.26% 13.36% +1.10%
2 2026-04-30 12.11% 12.26% +0.15%
3 2026-03-10 — 12.11% —

Full EPSS history (12 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-4876

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.3 2.0 HIGH
AV:N/AC:M/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:M)
Exploitation needs some favorable conditions, but not exceptional ones.
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.
 8.6 10.0 [email protected]

Weakness enumeration for CVE-2011-4876

Affected software / configurations for CVE-2011-4876

Vendor Product Version Raw CPE
siemens wincc_flexible 2004 cpe:2.3:a:siemens:wincc_flexible:2004:*:*:*:*:*:*:*
siemens wincc_flexible 2005 cpe:2.3:a:siemens:wincc_flexible:2005:*:*:*:*:*:*:*
siemens wincc_flexible 2007 cpe:2.3:a:siemens:wincc_flexible:2007:*:*:*:*:*:*:*
siemens wincc_flexible 2008 cpe:2.3:a:siemens:wincc_flexible:2008:*:*:*:*:*:*:*
siemens wincc v11 cpe:2.3:a:siemens:wincc:v11:*:*:*:*:*:*:*
siemens simatic_hmi_panels comfort_panels cpe:2.3:a:siemens:simatic_hmi_panels:comfort_panels:*:*:*:*:*:*:*
siemens simatic_hmi_panels mobile_panels cpe:2.3:a:siemens:simatic_hmi_panels:mobile_panels:*:*:*:*:*:*:*
siemens simatic_hmi_panels mp cpe:2.3:a:siemens:simatic_hmi_panels:mp:*:*:*:*:*:*:*
siemens simatic_hmi_panels op cpe:2.3:a:siemens:simatic_hmi_panels:op:*:*:*:*:*:*:*
siemens simatic_hmi_panels tp cpe:2.3:a:siemens:simatic_hmi_panels:tp:*:*:*:*:*:*:*
siemens wincc_runtime_advanced v11 cpe:2.3:a:siemens:wincc_runtime_advanced:v11:*:*:*:*:*:*:*
siemens wincc_flexible_runtime — cpe:2.3:a:siemens:wincc_flexible_runtime:*:*:*:*:*:*:*:*

References for CVE-2011-4876

cvelogic Threat Intelligence