CVE-2018-13815
HIGHEPSS 76th pctlDescription
A vulnerability has been identified in SIMATIC S7-1200 (All versions), SIMATIC S7-1500 (All Versions < V2.6). An attacker could exhaust the available connection pool of an affected device by opening a sufficient number of connections to the device. Successful exploitation requires an attacker to be able to send packets to port 102/tcp of the affected device. No user interaction and no user privileges are required to exploit the vulnerability. The vulnerability, if exploited, could cause a Denial-of-Service condition impacting the availability of the system. At the time of advisory publication no public exploitation of this vulnerability was known.
How to fix
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Exploit Intelligence
Elevated risk: more likely to be exploited than 76% of all known CVEs.
References
Related Vulnerabilities
Other CWE-410 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2022-40224 | High | 7.5 | 65% | - | - |
| CVE-2025-0453 | High | 7.5 | 10% | - | - |
| CVE-2022-2048 | High | 7.5 | 2.3% | - | Fix |
| CVE-2025-27479 | High | 7.5 | 2.0% | - | Fix |
| CVE-2019-13921 | High | 7.5 | 1.4% | - | - |
| CVE-2021-1615 | High | 8.6 | 1.3% | - | - |
Common questions
How do I fix CVE-2018-13815?
Upgrade simatic s7-1500 firmware to 2.6 or later.
Is CVE-2018-13815 being actively exploited?
Not that we know of. CVE-2018-13815 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 1.8% is the estimated probability that it will be exploited in the next 30 days. That is higher than 76% of all scored CVEs.
How severe is CVE-2018-13815?
CVE-2018-13815 has a CVSS v3 base score of 7.5, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
What does CVE-2018-13815 affect?
Published advisories record a fix for simatic s7-1500 firmware (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.