How severe is CVE-2016-2201?

CVE-2016-2201 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2016-2201 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-2201?

CVE-2016-2201 affects Siemens Simatic S7-1500 Cpu Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2016-2201?

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

When was CVE-2016-2201 published?

CVE-2016-2201 was published on 2016-02-08 and last updated on 2026-06-17.

CVE-2016-2201

CVE-2016-2201 is a medium-severity vulnerability in Siemens Simatic S7-1500 Cpu Firmware with a CVSS 3.x base score of 5.3. 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-20.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 5.0
EPSS exploit prediction: 3% (85th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Siemens Simatic S7-1500 Cpu Firmware
Published: 2016-02-08
Last modified: 2026-06-17

Description

Siemens SIMATIC S7-1500 CPU devices before 1.8.3 allow remote attackers to bypass a replay protection mechanism via packets on TCP port 102.

Frequently asked questions

What is CVE-2016-2201?: Siemens SIMATIC S7-1500 CPU devices before 1.8.3 allow remote attackers to bypass a replay protection mechanism via packets on TCP port 102.
How severe is CVE-2016-2201?: CVE-2016-2201 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2016-2201 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-2201?: CVE-2016-2201 affects Siemens Simatic S7-1500 Cpu Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2016-2201?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2016-2201 published?: CVE-2016-2201 was published on 2016-02-08 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:siemens:simatic_s7-1500_cpu_firmware:1.8.2:*:*:*:*:*:*:*

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