A vulnerability has been identified in SIMATIC TDC CP51M1 (All versions < V1.1.7).

published 2019-09-13 7 y ago modified 2026-06-17 4 mo ago also EUVD-2019-2651

cvss: 7.5; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.3%; EPSS 1.3% chance of exploitation in 30 days, percentile 70%
public exploits: 0; none known

A vulnerability has been identified in SIMATIC TDC CP51M1 (All versions < V1.1.7). An attacker with network access to the device could cause a Denial-of-Service condition by sending a specially crafted UDP packet. The vulnerability affects the UDP communication of the device. The security vulnerability could be exploited without authentication. No user interaction is required to exploit this security vulnerability. Successful exploitation of the security vulnerability compromises availability of the targeted system. At the time of advisory publication no public exploitation of this security vulnerability was known.

Patch / fix

fixed in 1 links 1

siemens simatic_tdc_cp51m1_firmware 1.1.7

cert-portal.siemens.com/productcert/pdf/ssa-250618.pdf advisory

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-19-253-05 updated 2019-09-10 cvss 7.5

ICSA-19-253-05 Siemens SIMATIC TDC CP51M1

Siemens SIMATIC TDC CP51M1 <V1.1.7
affected: fixed in V1.1.7, mitigation support.industry.siemens.com

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

Exploit prediction

1.28% chance of exploitation in the next 30 days, higher than 70% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

Siemens AG SIMATIC TDC CP51M1

Classification

Weakness

CWE-20 Improper Input Validation

References

cert-portal.siemens.com /productcert/pdf/ssa-250618.pdf
patch, vendor-advisory
us-cert.gov /ics/advisories/icsa-19-253-05

Sources

CVE List CVE-2019-10937
NVD CVE-2019-10937

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary