CVE-2014-8551

CVE-2014-8551 is a critical-severity vulnerability in Siemens Simatic Pcs 7 with a CVSS 2.0 base score of 10.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-94.

Key facts

• Severity: Critical (CVSS 2.0 base score 10.0)
• EPSS exploit prediction: 5% (92nd percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-94
• Affected product: Siemens Simatic Pcs 7
• Published: 2014-11-26
• Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.

How severe is CVE-2014-8551?

CVE-2014-8551 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-2014-8551 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2014-8551?

CVE-2014-8551 primarily affects Siemens Simatic Pcs 7. In total, 22 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2014-8551?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2014-8551 published?

CVE-2014-8551 was published on 2014-11-26 and last updated on 2026-06-17.

References

• http://www.siemens.com/innovation/pool/de/forschungsfelder/siemens_security_advisory_ssa-134508.pdf

Affected products (22)

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

More vulnerabilities in Siemens Simatic Pcs 7

• CVE-2023-25910 — Critical (CVSS 10.0): A vulnerability has been identified in SIMATIC PCS 7 (All versions < V9.1 SP2 UC04), SIMATIC S7-PM (All versions < V5.7…
• CVE-2021-40358 — Critical (CVSS 9.9): A vulnerability has been identified in SIMATIC PCS 7 V8.2 (All versions), SIMATIC PCS 7 V9.0 (All versions < V9.0 SP3…
• CVE-2019-10922 — Critical (CVSS 9.8): A vulnerability has been identified in SIMATIC PCS 7 V8.0 and earlier (All versions), SIMATIC PCS 7 V8.1 and newer (All…
• CVE-2021-40360 — High (CVSS 8.8): A vulnerability has been identified in SIMATIC PCS 7 V8.2 (All versions), SIMATIC PCS 7 V9.0 (All versions), SIMATIC…
• CVE-2019-10918 — High (CVSS 8.8): A vulnerability has been identified in SIMATIC PCS 7 V8.0 and earlier (All versions), SIMATIC PCS 7 V8.1 (All versions…
• CVE-2019-10916 — High (CVSS 8.8): A vulnerability has been identified in SIMATIC PCS 7 V8.0 and earlier (All versions), SIMATIC PCS 7 V8.1 (All versions…

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