How severe is CVE-2016-8561?

CVE-2016-8561 has a CVSS 3.x base score of 6.6, rated medium severity. It is exploitable over network with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2016-8561 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-8561?

CVE-2016-8561 affects Siemens Simatic Cp 1543-1 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2016-8561?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2016-8561 published?

CVE-2016-8561 was published on 2016-11-18 and last updated on 2026-06-17.

CVE-2016-8561

CVE-2016-8561 is a medium-severity vulnerability in Siemens Simatic Cp 1543-1 Firmware with a CVSS 3.x base score of 6.6. 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-264.

Key facts

Severity: Medium (CVSS 3.x base score 6.6)
CVSS v2: 6.0
EPSS exploit prediction: 2% (73rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-264
Affected product: Siemens Simatic Cp 1543-1 Firmware
Published: 2016-11-18
Last modified: 2026-06-17

Description

A vulnerability has been identified in SIMATIC CP 1543-1 (All versions < V2.0.28), SIPLUS NET CP 1543-1 (All versions < V2.0.28). Users with elevated privileges to TIA-Portal and project data on the engineering station could possibly get privileged access on affected devices.

Frequently asked questions

What is CVE-2016-8561?: A vulnerability has been identified in SIMATIC CP 1543-1 (All versions < V2.0.28), SIPLUS NET CP 1543-1 (All versions < V2.0.28). Users with elevated privileges to TIA-Portal and project data on the engineering station could possibly get privileged access on affected devices.
How severe is CVE-2016-8561?: CVE-2016-8561 has a CVSS 3.x base score of 6.6, rated medium severity. It is exploitable over network with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2016-8561 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-8561?: CVE-2016-8561 affects Siemens Simatic Cp 1543-1 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2016-8561?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2016-8561 published?: CVE-2016-8561 was published on 2016-11-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:siemens:simatic_cp_1543-1_firmware:-:*:*:*:*:*:*:*

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