What is CVE-2022-39823?

CVE-2022-39823 is a high-severity vulnerability in Softing Opc, classified under Use After Free. CVSS score: 7.5/10. Published 2022-10-20.

How severe is CVE-2022-39823?

High severity. CVSS v3 base score is 7.5 out of 10.

Use After Free in Softing Opc

CVE-2022-39823

An issue was discovered in Softing OPC UA C++ SDK 5.66 through 6.x before 6.10. An OPC/UA browse request exceeding the server limit on continuation points may cause a use-after-free error

Vulnerability class: Use-After-Free

Published 2022-10-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.007 (54.9th percentile), scored 2026-10-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 54.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: +0.001

Affected products

Weakness classification (CWE)

CWE-416 — Use After Free

References

www.softing.com (Vendor Advisory)
industrial.softing.com/fileadmin/psirt/downloads/syt-2022-8.html (Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2022-39823?: CVE-2022-39823 is a high-severity vulnerability in Softing Opc, classified under Use After Free. CVSS score: 7.5/10. Published 2022-10-20.
How severe is CVE-2022-39823?: High severity. CVSS v3 base score is 7.5 out of 10.