CVE-2019-18336

high

Published 2020-03-10 · Modified 2026-06-02

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CVSS v3

7.5

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v4 NEW

—

not yet in upstream

VIR risk

7.5

Description

A vulnerability has been identified in SIMATIC S7-300 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions < V3.X.17), SIMATIC TDC CP51M1 (All versions < V1.1.8), SIMATIC TDC CPU555 (All versions < V1.1.1), SINUMERIK 840D sl (All versions < V4.8.6), SINUMERIK 840D sl (All versions < V4.94). Specially crafted packets sent to port 102/tcp (Profinet) could cause the affected device to go into defect mode. A restart is required in order to recover the system. Successful exploitation requires an attacker to have network access to port 102/tcp, with no authentication. No user interation is required. At the time of advisory publication no public exploitation of this security vulnerability was known.

Predictions

Exploit likelihood

83%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

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Application impact

Vendor	Product	Versions	Fixed
siemens	simatic_s7-300_cpu	`-`
siemens	simatic_s7-300_cpu_312_ifm	`-`
siemens	simatic_s7-300_cpu_313	`-`
siemens	simatic_s7-300_cpu_314	`-`
siemens	simatic_s7-300_cpu_314_ifm	`-`
siemens	simatic_s7-300_cpu_315	`-`
siemens	simatic_s7-300_cpu_315-2_dp	`-`
siemens	simatic_s7-300_cpu_316-2_dp	`-`
siemens	simatic_s7-300_cpu_318-2	`-`
siemens	sinumerik_840d_sl	`{"endExcluding":"4.8.6"}`	`4.8.6`
siemens	sinumerik_840d_sl	`{"endExcluding":"4.94"}`	`4.94`
siemens	simatic_tdc_cp51m1	`-`
siemens	simatic_tdc_cpu555	`-`

References

https://cert-portal.siemens.com/productcert/pdf/ssa-508982.pdf

CWEs

CWE-400

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.