CVE-2026-33389: Software Security Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-8g88-35qx-36v7
Share
CVSS 7.5
CWE-671
Published
Advisory Summary

CVE-2026-33389 is a MODERATE (CVSS 7.5) security vulnerability vulnerability (CWE-671: Lack of Administrator Control over Security) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product uses security features in a way that prevents the product's administrator from tailoring security settings to reflect the environment in which the product is being used. this introduces resultant weaknesses or prevents it from operating at a level of security that is desired by the administrator.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-33389 at a Glance

CVE Identifier CVE-2026-33389
GHSA Identifier GHSA-8g88-35qx-36v7
Severity MODERATE
CVSS v3.1 Base Score 7.5
CWE Classification CWE-671: Lack of Administrator Control over Security
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:L).

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
Privileges Required None (PR:N)
User Interaction Required (UI:R)
Scope Changed (S:C)
Confidentiality High (C:H)
Integrity Low (I:L)
Availability Low (A:L)

How to Fix CVE-2026-33389

To remediate this vulnerability, upgrade all affected Software dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-33389, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree

Analyze the terminal output to locate any version of Software in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The mvn dependency:tree command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-671: Lack of Administrator Control over Security, where the product uses security features in a way that prevents the product's administrator from tailoring security settings to reflect the environment in which the product is being used. this introduces resultant weaknesses or prevents it from operating at a level of security that is desired by the administrator. In Software, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

An improper certificate/host key validation vulnerability was discovered in the Smart Polling functionality, which established encrypted connections to target devices without validating the remote host's identity, and no option was provided to enable it. A man-in-the-middle attacker positioned between a sensor and a polled device can, during a polling session, impersonate the device and intercept the communication, including the credentials used to access it. The captured credentials can then be replayed to authenticate against the device itself or against other devices sharing the same credentials, allowing the attacker to access and tamper with the device's data and to disrupt its operations.

References

NVD — CVE-2026-33389 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-33389
cert-portal.siemens.com/productcert/html/ss... WEB
https://cert-portal.siemens.com/productcert/html/ssa-911336.html
Software Security Information SECURITY
https://security.nozominetworks.com/NN-2026:20-01

Frequently Asked Questions

What is CVE-2026-33389?
CVE-2026-33389 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-671: Lack of Administrator Control over Security.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-33389?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-33389?
CVE-2026-33389 has a CVSS v3.1 base score of 7.5 (MODERATE) with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:L.
What CWE is associated with CVE-2026-33389?
CVE-2026-33389 is classified under CWE-671: Lack of Administrator Control over Security (The product uses security features in a way that prevents the product's administrator from tailoring security settings to reflect the environment in which the product is being used. This introduces resultant weaknesses or prevents it from operating at a level of security that is desired by the administrator.).
How can I check Maven dependencies for CVE-2026-33389?
Run the dependency tree command: 'mvn dependency:tree'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-8g88-35qx-36v7",
  "modified" : "2026-10-15T03:36:23Z",
  "published" : "2026-09-08T15:31:54Z",
  "aliases" : [ "CVE-2026-33389" ],
  "details" : "An improper certificate/host key validation vulnerability was discovered in the Smart Polling functionality, which established encrypted connections to target devices without validating the remote host's identity, and no option was provided to enable it. A man-in-the-middle attacker positioned between a sensor and a polled device can, during a polling session, impersonate the device and intercept the communication, including the credentials used to access it. The captured credentials can then be replayed to authenticate against the device itself or against other devices sharing the same credentials, allowing the attacker to access and tamper with the device's data and to disrupt its operations.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:L"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-33389"
  }, {
    "type" : "WEB",
    "url" : "https://cert-portal.siemens.com/productcert/html/ssa-911336.html"
  }, {
    "type" : "WEB",
    "url" : "https://security.nozominetworks.com/NN-2026:20-01"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-671" ],
    "severity" : "MODERATE",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-08T14:17:22Z"
  }
}