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.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.019 (79.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 79th percentile — 79.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.019 · newest: 0.019 · change: 0.000
Affected products
- Opcfoundation Ua-.net-Legacy
- Opcfoundation Ua .Net Standard Stack
- 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
- us-cert.cisa.gov/ics/advisories/icsa-21-133-03 (US Government Resource, Third Party Advisory)
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.