An issue was discovered in Softing OPC UA C++ SDK before 5.70.

published 2022-03-11 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-29238

cvss: 6.5; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.8%; EPSS 0.8% chance of exploitation in 30 days, percentile 57%
public exploits: 0; none known

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.

Patch / fix

fixed in 1

softing opc_ua_c++_software_development_kit 5.70.0

Exploit prediction

0.83% chance of exploitation in the next 30 days, higher than 57% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	6.5	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD	2.0	4.0	AV:N/AC:L/Au:S/C:N/I:N/A:P

Classification

Weakness

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-2021-42262.pdf
vendor-advisory

Sources

CVE List CVE-2021-42262
NVD CVE-2021-42262

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary