7.5

CVE-2021-27432: opcfoundation ua_.net_standard_stack Uncontrolled Recursion

CVSS: 7.5v3.1HighModified
Published 20-05-2021Last modified 03-08-2024
Open JSON

Vulnerability summary

CVE-2021-27432 is a high (CVSS 7.5) Uncontrolled Recursion vulnerability in opcfoundation ua_.net_standard_stack. EPSS estimates a 1.95% chance of exploitation in the next 30 days, higher than 79.9% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
1.95%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 20-05-2021
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

1.95%

Chance of exploitation in the next 30 days

Percentile

80%

Versus all other CVEs

30-day change

0.00 pp

From 1.95% on 19-09-2026

19-09-202619-10-2026
EPSS score
1.95%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Opcfoundation2 products

1 vendor · 2 products

References

1 links