CVE-2021-27434
Last modified
CVE-2021-27434 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Products with Unified Automation .NET based OPC UA Client/Server SDK Bundle: Versions V3.0.7 and prior (.NET 4.5, 4.0, and 3.5 Framework versions only) are vulnerable to an uncontrolled recursion, which may allow an attacker to trigger a stack overflow.. EPSS estimates a 1.74% chance of exploitation in the next 30 days.
Description
Products with Unified Automation .NET based OPC UA Client/Server SDK Bundle: Versions V3.0.7 and prior (.NET 4.5, 4.0, and 3.5 Framework versions only) are vulnerable to an uncontrolled recursion, which may allow an attacker to trigger a stack overflow.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Unified-Automation | .Net Based Opc Ua Client\/Server Sdk | <= 3.0.7 |
References
- https://us-cert.cisa.gov/ics/advisories/icsa-21-133-04Third Party Advisory, US Government Resource
- https://us-cert.cisa.gov/ics/advisories/icsa-21-133-04Third Party Advisory, US Government Resource
Timeline
- Published
- Last Modified
- Status
- Modified
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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