CVE-2026-76784: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-pfwg-rgvf-86xw
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CWE-325
Published
Advisory Summary

CVE-2026-76784 is a HIGH security vulnerability vulnerability (CWE-325: Missing Cryptographic Step) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product does not implement a required step in a cryptographic algorithm, resulting in weaker encryption than advertised by the algorithm.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-76784 at a Glance

CVE Identifier CVE-2026-76784
GHSA Identifier GHSA-pfwg-rgvf-86xw
Severity HIGH
CVSS v3.1 Base Score N/A
CWE Classification CWE-325: Missing Cryptographic Step
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

How to Fix CVE-2026-76784

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-2026-76784, 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-325: Missing Cryptographic Step, where the product does not implement a required step in a cryptographic algorithm, resulting in weaker encryption than advertised by the algorithm. 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

Multiple TP-Link Kasa smart home devices contain insufficient cryptographic protections in the local device communication protocol. An adjacent network attacker may intercept, replay or forge locally exchanged control messages, potentially resulting in unauthorized device control. Successful exploitation could allow an attacker to manipulate the operational state of an affected device, resulting in unauthorized state changes, disruption of normal device functionality or a denial-of-service condition.

References

NVD — CVE-2026-76784 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-76784
www.tp-link.com/en/support/download WEB
https://www.tp-link.com/en/support/download
www.tp-link.com/in/support/download WEB
https://www.tp-link.com/in/support/download
www.tp-link.com/us/support/download WEB
https://www.tp-link.com/us/support/download
www.tp-link.com/us/support/faq/5267 WEB
https://www.tp-link.com/us/support/faq/5267

Frequently Asked Questions

What is CVE-2026-76784?
CVE-2026-76784 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-325: Missing Cryptographic Step.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-76784?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-76784?
CVE-2026-76784 is classified under CWE-325: Missing Cryptographic Step (The product does not implement a required step in a cryptographic algorithm, resulting in weaker encryption than advertised by the algorithm.).
How can I check Maven dependencies for CVE-2026-76784?
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-pfwg-rgvf-86xw",
  "modified" : "2026-08-26T18:31:57Z",
  "published" : "2026-08-26T18:31:57Z",
  "aliases" : [ "CVE-2026-76784" ],
  "details" : "Multiple\nTP-Link Kasa smart home devices contain insufficient cryptographic protections\nin the local device communication protocol. An adjacent network attacker may\nintercept, replay or forge locally exchanged control messages, potentially\nresulting in unauthorized device control. \n\n\n\n\n\n\n\n\n\nSuccessful\nexploitation could allow an attacker to manipulate the operational state of an\naffected device, resulting in unauthorized state changes, disruption of normal\ndevice functionality or a denial-of-service condition.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/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-2026-76784"
  }, {
    "type" : "WEB",
    "url" : "https://www.tp-link.com/en/support/download"
  }, {
    "type" : "WEB",
    "url" : "https://www.tp-link.com/in/support/download"
  }, {
    "type" : "WEB",
    "url" : "https://www.tp-link.com/us/support/download"
  }, {
    "type" : "WEB",
    "url" : "https://www.tp-link.com/us/support/faq/5267"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-325" ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-08-26T18:17:01Z"
  }
}