How severe is CVE-2016-8562?

CVE-2016-8562 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2016-8562 being actively exploited?

Yes. CVE-2016-8562 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-03-03, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2016-8562?

CVE-2016-8562 primarily affects Siemens Simatic Cp 1543-1 Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-8562?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2016-8562 have an EU (EUVD) identifier?

Yes. CVE-2016-8562 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2016-9410. It is also flagged as exploited in the EUVD (since 2022-03-03).

When was CVE-2016-8562 published?

CVE-2016-8562 was published on 2016-11-18 and last updated on 2026-06-17.

CVE-2016-8562

CVE-2016-8562 is a high-severity vulnerability in Siemens Simatic Cp 1543-1 Firmware with a CVSS 3.x base score of 7.5. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2022-03-03).

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 3.5
EPSS exploit prediction: 4% (88th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2022-03-03)
EU (EUVD) id: EUVD-2016-9410
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2022-03-03)
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). Under special conditions it was possible to write SNMP variables on port 161/udp which should be read-only and should only be configured with TIA-Portal. A write to these variables could reduce the availability or cause a denial-of-service.

Frequently asked questions

What is CVE-2016-8562?: 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). Under special conditions it was possible to write SNMP variables on port 161/udp which should be read-only and should only be configured with TIA-Portal. A write to these variables could reduce the availability or cause a denial-of-service.
How severe is CVE-2016-8562?: CVE-2016-8562 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2016-8562 being actively exploited?: Yes. CVE-2016-8562 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-03-03, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2016-8562?: CVE-2016-8562 primarily affects Siemens Simatic Cp 1543-1 Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2016-8562?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2016-8562 have an EU (EUVD) identifier?: Yes. CVE-2016-8562 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2016-9410. It is also flagged as exploited in the EUVD (since 2022-03-03).
When was CVE-2016-8562 published?: CVE-2016-8562 was published on 2016-11-18 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:o:siemens:simatic_cp_1543-1_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:siplus_net_cp_1543-1_firmware:*:*:*:*:*:*:*:*

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