What is CVE-2019-5039?

CVE-2019-5039 is a high-severity vulnerability in Openweave Openweave-Core, classified under Heap-based Buffer Overflow. CVSS score: 8.8/10. Published 2019-08-20.

How severe is CVE-2019-5039?

High severity. CVSS v3 base score is 8.8 out of 10.

Buffer overflow in Openweave Openweave-Core

CVE-2019-5039

An exploitable command execution vulnerability exists in the ASN1 certificate writing functionality of Openweave-core version 4.0.2. A specially crafted weave certificate can trigger a heap-based buffer overflow, resulting in code execution. An attacker can craft a weave certificate to trigger this vulnerability.

Vulnerability class: Buffer Overflow

Published 2019-08-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.016 (75.1th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 75th percentile — 75.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: 0.000

Affected products

Openweave Openweave-Core — versions 4.0.2
Nest Labs — versions Nest Labs Openweave-core 4.0.2

Weakness classification (CWE)

References

talosintelligence.com/vulnerability_reports/TALOS-2019-0802 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2019-5039?: CVE-2019-5039 is a high-severity vulnerability in Openweave Openweave-Core, classified under Heap-based Buffer Overflow. CVSS score: 8.8/10. Published 2019-08-20.
How severe is CVE-2019-5039?: High severity. CVSS v3 base score is 8.8 out of 10.