Vulnerability in Opcfoundation Ua-.net-legacy
CVE-2021-27432
OPC Foundation UA .NET Standard versions prior to 1.4.365.48 and OPC UA .NET Legacy are vulnerable to an uncontrolled recursion, which may allow an attacker to trigger a stack overflow.
EPSS: 0.022 (80.1th 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:N/I:N/A:H.
Affected products
- Opcfoundation Ua-.net-legacy
- Opcfoundation Ua_.net_standard_stack
- N/a Opc Foundation Ua .Net Standard And Legacy — versions OPC UA .NET Standard versions prior to 1.4.365.48 and OPC UA .NET Legacy
Weakness classification (CWE)
Public proof-of-concept exploits
References
- ics-cert@hq.dhs.gov (US Government Resource, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2021-27432?
- CVE-2021-27432 is a high-severity vulnerability in Opcfoundation Ua-.net-legacy, classified under Uncontrolled Recursion. CVSS score: 7.5/10. Published 2021-05-20.
- How severe is CVE-2021-27432?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2021-27432 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.