CVE-2020-11637

mediumpriority · track · 30EPSS 0.011 · 65 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.09% (65th) EPSS

CVSS 5 · medium

Is it mine?

14 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-28

A memory leak in the TFTP service in B&R Automation Runtime versions <N4.26, <N4.34, <F4.45, <E4.53, <D4.63, <A4.73 and prior could allow an unauthenticated attacker with network access to cause a denial of service (DoS) condition.

cvss

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

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–7.5

v2.05mediumAV:N/AC:L/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 10 · impact 2.9

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

v3.15.8mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Lsecondary · ENISA EU

v3.15.8mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Lsecondary · cybersecurity@ch.abb.comexploitability 3.9 · impact 1.4

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-401USprimary

affected products (14)

Products and version ranges known to be affected.

B&R Automation Runtime≤ unspecified ≤4.1xenisa_euvdEU
B&R Automation Runtime4.2x → N4.26enisa_euvdEU
B&R Automation Runtime4.3x → N4.34enisa_euvdEU
B&R Automation Runtime4.4x → F4.45enisa_euvdEU
B&R Automation Runtime4.5x → E4.53enisa_euvdEU
B&R Automation Runtime4.6x → D4.63enisa_euvdEU
B&R Automation Runtime4.7x → A4.73enisa_euvdEU
br-automation automation runtime≤ 4.10nvdUScpe:2.3:a:br-automation:automation_runtime:*:*:*:*:*:*:*:*
br-automation automation runtime4.20 → n4.26nvdUScpe:2.3:a:br-automation:automation_runtime:*:*:*:*:*:*:*:*
br-automation automation runtime4.30 → n4.34nvdUScpe:2.3:a:br-automation:automation_runtime:*:*:*:*:*:*:*:*
br-automation automation runtime4.40 → f4.45nvdUScpe:2.3:a:br-automation:automation_runtime:*:*:*:*:*:*:*:*
br-automation automation runtime4.50 → e4.53nvdUScpe:2.3:a:br-automation:automation_runtime:*:*:*:*:*:*:*:*
br-automation automation runtime4.60 → d4.63nvdUScpe:2.3:a:br-automation:automation_runtime:*:*:*:*:*:*:*:*
br-automation automation runtime4.70 → a4.73nvdUScpe:2.3:a:br-automation:automation_runtime:*:*:*:*:*:*:*:*

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

published 2020-10-15modified 2026-06-17

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references (4)

External citations — patches, advisories, analysis.

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