CVE-2016-2201

MEDIUMNVD 5.35.3—

5.3

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.

CVSS v3: 5.3
EG Score: 5.3(medium)
EPSS: 79.8%
KEV: Not listed

Published

February 8, 2016

Last Modified

May 6, 2026

References (10)

cve@mitrehttp://www.securityfocus.com/bid/83110
cve@mitrehttp://www.securitytracker.com/id/1034954
cve@mitrehttp://www.siemens.com/cert/pool/cert/siemens_security_advisory_ssa-253230.pdf
cve@mitrehttps://cert-portal.siemens.com/productcert/pdf/ssa-253230.pdf
cve@mitrehttps://ics-cert.us-cert.gov/advisories/ICSA-16-040-02
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/83110
af854a3a-2127-422b-91ae-364da2661108http://www.securitytracker.com/id/1034954
af854a3a-2127-422b-91ae-364da2661108http://www.siemens.com/cert/pool/cert/siemens_security_advisory_ssa-253230.pdf
af854a3a-2127-422b-91ae-364da2661108https://cert-portal.siemens.com/productcert/pdf/ssa-253230.pdf
af854a3a-2127-422b-91ae-364da2661108https://ics-cert.us-cert.gov/advisories/ICSA-16-040-02

Data Freshness Timeline

(refreshed 9× in last 7d / 20× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

2026-06-08 14:14 UTCEPSS rescore
2026-06-07 15:22 UTCEPSS rescore
2026-06-07 15:22 UTCEPSS rescore
2026-06-06 13:45 UTCEPSS rescore
2026-06-05 22:44 UTCEPSS rescore
2026-06-05 06:08 UTCEPSS rescore
2026-06-05 06:08 UTCEPSS rescore
2026-06-04 13:10 UTCEPSS rescore
2026-06-04 13:10 UTCEPSS rescore
2026-06-02 20:10 UTCEPSS rescore
2026-06-01 13:49 UTCEPSS rescore
2026-06-01 13:49 UTCEPSS rescore
2026-05-31 22:28 UTCEPSS rescore
2026-05-31 22:28 UTCEPSS rescore
2026-05-31 00:14 UTCEPSS rescore
2026-05-29 13:41 UTCEPSS rescore
2026-05-28 13:42 UTCEPSS rescore
2026-05-28 13:42 UTCEPSS rescore
2026-05-27 13:38 UTCEPSS rescore
2026-05-27 13:38 UTCEPSS rescore

Frequently asked(5)

What is CVE-2016-2201?

CVE-2016-2201 is a medium vulnerability published on February 8, 2016. 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.

When was CVE-2016-2201 disclosed?

CVE-2016-2201 was first published in the National Vulnerability Database on February 8, 2016, with the most recent update on May 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2016-2201 actively exploited?

CVE-2016-2201 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 79.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2016-2201?

CVE-2016-2201 has a CVSS v3 base score of 5.3 (NVD).

How do I remediate CVE-2016-2201?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2016-2201, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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CVE-2016-2201

📅 Published

🔄 Last Modified

🔗 References (10)