CVE-2014-8551

The WinCC server in Siemens SIMATIC WinCC 7.0 through SP3, 7.2 before Update 9, and 7.3 before Update 2; SIMATIC PCS 7 7.1 through SP4, 8.0 through SP2, and 8.1; and TIA Portal 13 before Update 6 allows remote attackers to execute arbitrary code via crafted packets.

Published: 2014-11-26 Last update: 2026-05-06 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2014-8551 is rated High Risk (72.9/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 5.81%). EPSS rose +1.44% over the last day, indicating growing attacker interest. High exploitation likelihood—assess exposure and prioritize remediation.

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

Exploit prediction scoring system (EPSS) score for CVE-2014-8551

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 2025-04-19 4.36% 5.81% +1.44%
2 2025-04-05 2.41% 4.36% +1.95%
3 2025-03-30 — 2.41% —

Full EPSS history (12 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2014-8551

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-2014-8551

Affected software / configurations for CVE-2014-8551

Vendor Product Version Raw CPE
siemens simatic_pcs_7 7.1 cpe:2.3:a:siemens:simatic_pcs_7:7.1:sp1:*:*:*:*:*:*
siemens simatic_pcs7 7.1 cpe:2.3:a:siemens:simatic_pcs7:7.1:sp3:*:*:*:*:*:*
siemens simatic_pcs7 7.1 cpe:2.3:a:siemens:simatic_pcs7:7.1:sp4:*:*:*:*:*:*
siemens simatic_pcs7 8.0 cpe:2.3:a:siemens:simatic_pcs7:8.0:sp1:*:*:*:*:*:*
siemens simatic_pcs7 8.0 cpe:2.3:a:siemens:simatic_pcs7:8.0:sp2:*:*:*:*:*:*
siemens simatic_pcs7 8.1 cpe:2.3:a:siemens:simatic_pcs7:8.1:*:*:*:*:*:*:*
siemens simatic_tiaportal 13.0 cpe:2.3:a:siemens:simatic_tiaportal:13.0:*:*:*:*:*:*:*
siemens simatic_tiaportal 13.0 cpe:2.3:a:siemens:simatic_tiaportal:13.0:3:*:*:*:*:*:*
siemens simatic_tiaportal 13.0 cpe:2.3:a:siemens:simatic_tiaportal:13.0:5:*:*:*:*:*:*
siemens simatic_wincc 7.0 cpe:2.3:a:siemens:simatic_wincc:7.0:*:*:*:*:*:*:*
siemens simatic_wincc 7.0 cpe:2.3:a:siemens:simatic_wincc:7.0:sp1:*:*:*:*:*:*
siemens simatic_wincc 7.0 cpe:2.3:a:siemens:simatic_wincc:7.0:sp2:*:*:*:*:*:*
siemens simatic_wincc 7.0 cpe:2.3:a:siemens:simatic_wincc:7.0:sp3:*:*:*:*:*:*
siemens simatic_wincc 7.2 cpe:2.3:a:siemens:simatic_wincc:7.2:1:*:*:*:*:*:*
siemens simatic_wincc 7.2 cpe:2.3:a:siemens:simatic_wincc:7.2:2:*:*:*:*:*:*
siemens simatic_wincc 7.2 cpe:2.3:a:siemens:simatic_wincc:7.2:3:*:*:*:*:*:*
siemens simatic_wincc 7.2 cpe:2.3:a:siemens:simatic_wincc:7.2:4:*:*:*:*:*:*
siemens simatic_wincc 7.2 cpe:2.3:a:siemens:simatic_wincc:7.2:5:*:*:*:*:*:*
siemens simatic_wincc 7.2 cpe:2.3:a:siemens:simatic_wincc:7.2:6:*:*:*:*:*:*
siemens simatic_wincc 7.2 cpe:2.3:a:siemens:simatic_wincc:7.2:7:*:*:*:*:*:*
siemens simatic_wincc 7.2 cpe:2.3:a:siemens:simatic_wincc:7.2:8:*:*:*:*:*:*
siemens simatic_wincc 7.3 cpe:2.3:a:siemens:simatic_wincc:7.3:1:*:*:*:*:*:*

References for CVE-2014-8551

cvelogic Threat Intelligence