How severe is CVE-2019-19643?

CVE-2019-19643 has a CVSS 3.x base score of 7.5, rated high 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 high.

Is CVE-2019-19643 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-19643?

CVE-2019-19643 affects Ise Smart Connect Knx Vaillant. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-19643?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2019-19643 published?

CVE-2019-19643 was published on 2020-08-14 and last updated on 2026-06-17.

CVE-2019-19643

CVE-2019-19643 is a high-severity vulnerability in Ise Smart Connect Knx Vaillant with a CVSS 3.x base score of 7.5. 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-835.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (69th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-835
Affected product: Ise Smart Connect Knx Vaillant
Published: 2020-08-14
Last modified: 2026-06-17

Description

ise smart connect KNX Vaillant 1.2.839 contain a Denial of Service.

Frequently asked questions

What is CVE-2019-19643?: ise smart connect KNX Vaillant 1.2.839 contain a Denial of Service.
How severe is CVE-2019-19643?: CVE-2019-19643 has a CVSS 3.x base score of 7.5, rated high 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 high.
Is CVE-2019-19643 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-19643?: CVE-2019-19643 affects Ise Smart Connect Knx Vaillant. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-19643?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2019-19643 published?: CVE-2019-19643 was published on 2020-08-14 and last updated on 2026-06-17.

References

https://psytester.github.io/CVE-2019-19643/

Affected products (1)

cpe:2.3:a:ise:smart_connect_knx_vaillant:1.2.839:*:*:*:*:*:*:*

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