What is CVE-2021-27434?

CVE-2021-27434 is a high-severity vulnerability in Microsoft .Net Framework, classified under Information Disclosure. CVSS score: 7.5/10. Published 2021-05-20.

How severe is CVE-2021-27434?

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

Information disclosure in Microsoft .Net Framework

CVE-2021-27434

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.

Vulnerability class: Information Disclosure

EPSS: 0.017 (75.4th percentile) — read the EPSS interpretation.

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:H/I:N/A:N.

Affected products

Microsoft .Net_framework — versions 3.5, 4.0, 4.5
Unified-automation .Net_based_opc_ua_client\/server_sdk
N/a Opc Ua Products Built With The .Net Framework 4.5, 4.0, And 3.5 — versions 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)

Weakness classification (CWE)

References

ics-cert@hq.dhs.gov (US Government Resource, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-27434?: CVE-2021-27434 is a high-severity vulnerability in Microsoft .Net Framework, classified under Information Disclosure. CVSS score: 7.5/10. Published 2021-05-20.
How severe is CVE-2021-27434?: High severity. CVSS v3 base score is 7.5 out of 10.