How severe is CVE-2020-11637?

CVE-2020-11637 has a CVSS 3.x base score of 5.8, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2020-11637 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-11637?

CVE-2020-11637 affects Br-automation Automation Runtime. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-11637?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-11637 published?

CVE-2020-11637 was published on 2020-10-15 and last updated on 2026-06-17.

CVE-2020-11637

CVE-2020-11637 is a medium-severity vulnerability in Br-automation Automation Runtime with a CVSS 3.x base score of 5.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-401.

Key facts

Severity: Medium (CVSS 3.x base score 5.8)
CVSS v2: 5.0
EPSS exploit prediction: 1% (61st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-401
Affected product: Br-automation Automation Runtime
Published: 2020-10-15
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2020-11637?: 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.
How severe is CVE-2020-11637?: CVE-2020-11637 has a CVSS 3.x base score of 5.8, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2020-11637 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-11637?: CVE-2020-11637 affects Br-automation Automation Runtime. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-11637?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-11637 published?: CVE-2020-11637 was published on 2020-10-15 and last updated on 2026-06-17.

References

https://www.br-automation.com/downloads_br_productcatalogue/assets/1595163815396-de-original-1.0.pdf

Affected products (1)

cpe:2.3:a:br-automation:automation_runtime:*:*:*:*:*:*:*:*

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