How severe is CVE-2019-5917?

CVE-2019-5917 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-2019-5917 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 21% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-5917?

CVE-2019-5917 affects Microsoft Azure-umqtt-c. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-5917?

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-2019-5917 published?

CVE-2019-5917 was published on 2019-03-12 and last updated on 2026-06-17.

CVE-2019-5917

CVE-2019-5917 is a high-severity vulnerability in Microsoft Azure-umqtt-c with a CVSS 3.x base score of 7.5. Its EPSS exploit-prediction score of 21% places it in the 97th percentile, indicating an elevated likelihood of exploitation.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 21% (97th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Microsoft Azure-umqtt-c
Published: 2019-03-12
Last modified: 2026-06-17

Description

azure-umqtt-c (available through GitHub prior to 2017 October 6) allows remote attackers to cause a denial of service via unspecified vectors.

Frequently asked questions

What is CVE-2019-5917?: azure-umqtt-c (available through GitHub prior to 2017 October 6) allows remote attackers to cause a denial of service via unspecified vectors.
How severe is CVE-2019-5917?: CVE-2019-5917 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-2019-5917 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 21% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-5917?: CVE-2019-5917 affects Microsoft Azure-umqtt-c. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-5917?: 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-2019-5917 published?: CVE-2019-5917 was published on 2019-03-12 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:microsoft:azure-umqtt-c:*:*:*:*:*:*:*:*