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Vulnerability record · CVE-2018-13805 · published 10 October 2018

CVE-2018-13805: Siemens simatic et 200sp firmware uncontrolled resource consumption vulnerability

Siemens · Simatic Et 200sp Firmware

A vulnerability has been identified in SIMATIC ET 200SP Open Controller (All versions >= V2.0 and < V2.1.6), SIMATIC S7-1500 Software Controller (All versions >= V2.0 and < V2.5), SIMATIC S7-1500 incl. F (All versions >= V2.0 and < V2.5). An attacker can cause a denial-of-service condition on the network stack by sending a large number of specially crafted packets to the PLC. The PLC will lose its ability to communicate over the network. This vulnerability could be exploited by an attacker with network access to the affected systems. Successful exploitation requires no privileges and no user interaction. An attacker could use this vulnerability to compromise availability of the network connectivity. At the time of advisory publication no public exploitation of this vulnerability was known.

7.5 CVSS 3.0 High EPSS 1.5% · top 26.2% CWE-400 · Uncontrolled resource consumption
7.5CVSS 3.0 base score, v2 5.0
1.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

A vulnerability has been identified in SIMATIC ET 200SP Open Controller (All versions >= V2.0 and < V2.1.6), SIMATIC S7-1500 Software Controller (All versions >= V2.0 and < V2.5), SIMATIC S7-1500 incl. F (All versions >= V2.0 and < V2.5). An attacker can cause a denial-of-service condition on the network stack by sending a large number of specially crafted packets to the PLC. The PLC will lose its ability to communicate over the network. This vulnerability could be exploited by an attacker with network access to the affected systems. Successful exploitation requires no privileges and no user interaction. An attacker could use this vulnerability to compromise availability of the network connectivity. At the time of advisory publication no public exploitation of this vulnerability was known.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://cert-portal.siemens.com/productcert/pdf/ssa-347726.pdf Vendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-347726.pdf Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

7.5CVE-2014-0160OpenSSL TLS/DTLS Heartbeat Extension Out-of-Bounds Read (Heartbleed)OpenSSL 1.0.1 before 1.0.1g mishandles Heartbeat Extension packets in its TLS and DTLS implementations, causing an out-of-bounds read of process memo…KEVEPSS 100%analysed8.7CVE-2017-12741Siemens simatic s7-200 firmware uncontrolled resource consumption vulnerabilitySpecially crafted packets sent to port 161/udp could cause a denial of service condition. The affected devices must be restarted manually.EPSS 3.3%7.8CVE-2020-8744Intel converged security and management engine vulnerabilityImproper initialization in subsystem for Intel(R) CSME versions before12.0.70, 13.0.40, 13.30.10, 14.0.45 and 14.5.25, Intel(R) TXE versions before 4…EPSS 0.36%7.5CVE-2018-16558Siemens simatic s7-1500 firmware improper input validation vulnerabilityA vulnerability has been identified in SIMATIC S7-1500 CPU (All versions >= V2.0 and < V2.5), SIMATIC S7-1500 CPU (All versions <= V1.8.5). Specially…EPSS 2.0%7.5CVE-2018-16559Siemens simatic s7-1500 firmware improper input validation vulnerabilityA vulnerability has been identified in SIMATIC S7-1500 CPU (All versions >= V2.0 and < V2.5), SIMATIC S7-1500 CPU (All versions <= V1.8.5). Specially…EPSS 2.0%7.5CVE-2019-6568Siemens cp1604 firmware out-of-bounds read vulnerabilityThe webserver of the affected devices contains a vulnerability that may lead to a denial of service condition. An attacker may cause a denial of serv…EPSS 1.4%7.5CVE-2019-6575Siemens simatic cp443-1 opc ua firmware vulnerabilityA vulnerability has been identified in SIMATIC CP 443-1 OPC UA (All versions), SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants…EPSS 1.6%7.5CVE-2018-13815Siemens simatic s7-1200 firmware uncontrolled resource consumption vulnerabilityA vulnerability has been identified in SIMATIC S7-1200 (All versions), SIMATIC S7-1500 (All Versions < V2.6). An attacker could exhaust the available…EPSS 1.8%

Source: NIST National Vulnerability Database (record CVE-2018-13805), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.