CVE-2020-9464

highpriority · track · 30EPSS 0.014 · 72 %ileDEEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

1.38% (72nd) EPSS

CVSS 7.8 · high

Is it mine?

5 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · beckhoff_psirt

EPSS · scored 2026-10-27

A Denial-of-Service vulnerability exists in BECKHOFF Ethernet TCP/IP Bus Coupler BK9000. After an attack has occurred, the device's functionality can be restored by rebooting.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

No vendor fix yet; a mitigation is available.

MitigationBK9000beckhoff_psirt
Beckhoff will not change this behaviour. Customers should configure a perimeter firewall to block traffic from untrusted networks to the device.

cvss

Technical severity, 0–10. One row per scoring source.

7.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.9–7.8

v2.07.8highAV:N/AC:L/Au:N/C:N/I:N/A:Cprimary · NVD / NIST USexploitability 10 · impact 6.9

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.17.5highAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · Beckhoff PSIRT DE

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-400USprimaryCWE-400USCWE-400US

affected products (5)

Products and version ranges known to be affected.

Beckhoff Automation BK9000≤ vers:all/*beckhoff_psirtDE
Beckhoff Automation BK9000 vers:all/*≤ vers:all/*beckhoff_psirtDE
n/a n/a≤ n/aenisa_euvdEU
Beckhoff Automation GmbH & Co. KG BK9000 Ethernet TCP/IP Bus Couplerall versionsfstec_bduRU
beckhoff bk9000 firmwareall versionsnvdUScpe:2.3:o:beckhoff:bk9000_firmware:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

VDE-2020-005Beckhoff: BK9000 couplers - Denial of service inhibits function2020-03-10csaf · beckhoff_psirtDE
The coupler's function could be inhibited by an attack.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu beckhoff_psirt nvd NVD CVE.org MITRE

published 2020-03-12modified 2026-06-17

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+9608 more

references (4)

External citations — patches, advisories, analysis.

scry

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