CVE-2026-5040: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-6vqq-hcvj-cx94
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CVSS 6.7
CWE-916
Published
Advisory Summary

CVE-2026-5040 is a HIGH (CVSS 6.7) security vulnerability vulnerability (CWE-916: Use of Password Hash With Insufficient Computational Effort) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product generates a hash for a password, but it uses a scheme that does not provide a sufficient level of computational effort that would make password cracking attacks infeasible or expensive.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-5040 at a Glance

CVE Identifier CVE-2026-5040
GHSA Identifier GHSA-6vqq-hcvj-cx94
Severity HIGH
CVSS v3.1 Base Score 6.7
CWE Classification CWE-916: Use of Password Hash With Insufficient Computational Effort
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 6.7

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

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

How to Fix CVE-2026-5040

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-2026-5040, 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-916: Use of Password Hash With Insufficient Computational Effort, where the product generates a hash for a password, but it uses a scheme that does not provide a sufficient level of computational effort that would make password cracking attacks infeasible or expensive. 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

TP-Link Deco M5 v1 uses a weak password hashing mechanism to store user credentials. An attacker who obtains the password hash through system compromise or privileged access could perform brute-force or dictionary attacks. Successful exploitation may result in disclosure of authentication credentials, enabling unauthorized access to device management functions, depending on the privileges associated with the recovered password. The primary security impact is loss of confidentiality.

References

NVD — CVE-2026-5040 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-5040
www.tp-link.com/en/support/download... WEB
https://www.tp-link.com/en/support/download/deco-m5/v1/#Firmware
www.tp-link.com/us/support/download... WEB
https://www.tp-link.com/us/support/download/deco-m5/v1/#Firmware
www.tp-link.com/us/support/faq/5190 WEB
https://www.tp-link.com/us/support/faq/5190

Frequently Asked Questions

What is CVE-2026-5040?
CVE-2026-5040 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-916: Use of Password Hash With Insufficient Computational Effort.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-5040?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-5040?
CVE-2026-5040 has a CVSS v3.1 base score of 6.7 (HIGH) with vector string CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-5040?
CVE-2026-5040 is classified under CWE-916: Use of Password Hash With Insufficient Computational Effort (The product generates a hash for a password, but it uses a scheme that does not provide a sufficient level of computational effort that would make password cracking attacks infeasible or expensive.).
How can I check Maven dependencies for CVE-2026-5040?
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-6vqq-hcvj-cx94",
  "modified" : "2026-08-06T18:30:29Z",
  "published" : "2026-07-14T21:32:16Z",
  "aliases" : [ "CVE-2026-5040" ],
  "details" : "TP-Link Deco M5 v1 uses a weak password hashing mechanism to store user credentials.  An attacker who obtains the password hash through system compromise or privileged access could perform brute-force or dictionary attacks.\n\nSuccessful exploitation may result in disclosure of authentication credentials, enabling unauthorized access to device management functions, depending on the privileges associated with the recovered password. The primary security impact is loss of confidentiality.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:L/AC:H/AT:N/PR:H/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-2026-5040"
  }, {
    "type" : "WEB",
    "url" : "https://www.tp-link.com/en/support/download/deco-m5/v1/#Firmware"
  }, {
    "type" : "WEB",
    "url" : "https://www.tp-link.com/us/support/download/deco-m5/v1/#Firmware"
  }, {
    "type" : "WEB",
    "url" : "https://www.tp-link.com/us/support/faq/5190"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-916" ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-07-14T19:18:03Z"
  }
}