CVE-2018-13815

Severity: high (CVSS 7.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-12-13 · updated 2026-06-17
Weakness: CWE-410

Description

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.

Affected products

Siemens Simatic S7-1200 Firmware: all versions
Siemens SIMATIC S7-1500 CPU: before 2.6 — fixed in 2.6

How to fix

Upgrade to a fixed version: Siemens SIMATIC S7-1500 CPU 2.6. Check the vendor advisory for mitigations.

References

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