What is CVE-2021-42262?

CVE-2021-42262 is a medium-severity vulnerability in Softing Datafeed Opc Suite, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 6.5/10. Published 2022-03-11.

How severe is CVE-2021-42262?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Buffer overflow in Softing Datafeed Opc Suite

CVE-2021-42262

An issue was discovered in Softing OPC UA C++ SDK before 5.70. An invalid XML element in the type dictionary makes the OPC/UA client crash due to an out-of-memory condition.

Vulnerability class: Buffer Overflow

Published 2022-03-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.008 (57.5th percentile), scored 2026-10-31.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 57.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

References

industrial.softing.com/us/solutions/opc-and-opc-ua.html (Vendor Advisory)
industrial.softing.com/fileadmin/sof-files/pdf/ia/support/Security_Bulletin_CVE… (Vendor Advisory)

Frequently asked questions

What is CVE-2021-42262?: CVE-2021-42262 is a medium-severity vulnerability in Softing Datafeed Opc Suite, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 6.5/10. Published 2022-03-11.
How severe is CVE-2021-42262?: Medium severity. CVSS v3 base score is 6.5 out of 10.