How severe is CVE-2019-16747?

CVE-2019-16747 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-2019-16747 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-16747?

CVE-2019-16747 affects Matrixssl. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-16747?

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-2019-16747 published?

CVE-2019-16747 was published on 2020-12-30 and last updated on 2026-06-17.

CVE-2019-16747

CVE-2019-16747 is a high-severity vulnerability in Matrixssl 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-787.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (75th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Matrixssl
Published: 2020-12-30
Last modified: 2026-06-17

Description

In MatrixSSL before 4.2.2 Open, the DTLS server can encounter an invalid pointer free (leading to memory corruption and a daemon crash) via a crafted incoming network message, a different vulnerability than CVE-2019-14431.

Frequently asked questions

What is CVE-2019-16747?: In MatrixSSL before 4.2.2 Open, the DTLS server can encounter an invalid pointer free (leading to memory corruption and a daemon crash) via a crafted incoming network message, a different vulnerability than CVE-2019-14431.
How severe is CVE-2019-16747?: CVE-2019-16747 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-2019-16747 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-16747?: CVE-2019-16747 affects Matrixssl. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-16747?: 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-2019-16747 published?: CVE-2019-16747 was published on 2020-12-30 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:matrixssl:matrixssl:*:*:*:*:*:*:*:*

More vulnerabilities in Matrixssl

CVE-2019-14431 — Critical (CVSS 9.8): In MatrixSSL 3.8.3 Open through 4.2.1 Open, the DTLS server mishandles incoming network messages leading to a…
CVE-2019-13470 — Critical (CVSS 9.8): MatrixSSL before 4.2.1 has an out-of-bounds read during ASN.1 handling.
CVE-2019-10914 — Critical (CVSS 9.8): pubRsaDecryptSignedElementExt in MatrixSSL 4.0.1 Open, as used in Inside Secure TLS Toolkit, has a stack-based buffer…
CVE-2017-2781 — Critical (CVSS 9.8): An exploitable heap buffer overflow vulnerability exists in the X509 certificate parsing functionality of InsideSecure…
CVE-2017-2780 — Critical (CVSS 9.8): An exploitable heap buffer overflow vulnerability exists in the X509 certificate parsing functionality of InsideSecure…
CVE-2016-6890 — Critical (CVSS 9.8): Heap-based buffer overflow in MatrixSSL before 3.8.6 allows remote attackers to execute arbitrary code via a crafted…

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