CVE-2021-27434

EPSS 1.7%CWE-200

Vexday Risk Score

3Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS —EPSS 1.7%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

20 May 2021Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

Affected products

n/a · OPC UA Products Built with the .NET Framework 4.5, 4.0, and 3.5

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References

https://us-cert.cisa.gov/ics/advisories/icsa-21-133-04