CVE-2026-76651: Software Security Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-wqxh-m9g7-9pc2
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CWE-120
Published
Advisory Summary

CVE-2026-76651 is a MODERATE security vulnerability vulnerability (CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-76651 at a Glance

CVE Identifier CVE-2026-76651
GHSA Identifier GHSA-wqxh-m9g7-9pc2
Severity MODERATE
CVSS v3.1 Base Score N/A
CWE Classification CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

How to Fix CVE-2026-76651

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-2026-76651, 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-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow'), where the product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer. 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

A buffer overflow vulnerability exists in the embedded HTTP service in TL-WR841N v14 when processing multipart/form-data requests. Insufficient validation of an attacker-controlled boundary parameter may allow a remote unauthenticated attacker to submit a crafted request that corrupts memory by overwriting data beyond the bounds of an internal buffer. Successful exploitation may result in modification or corruption of process memory, potentially leading to undefined application behavior. Arbitrary code execution, information disclosure, and denial-of-service conditions have not been demonstrated.

References

NVD — CVE-2026-76651 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-76651
www.tp-link.com/en/support/download... WEB
https://www.tp-link.com/en/support/download/tl-wr841n/v14/#Firmware
www.tp-link.com/us/support/download... WEB
https://www.tp-link.com/us/support/download/tl-wr841n/v14/#Firmware
www.tp-link.com/us/support/faq/5270 WEB
https://www.tp-link.com/us/support/faq/5270

Frequently Asked Questions

What is CVE-2026-76651?
CVE-2026-76651 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow').
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-76651?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-76651?
CVE-2026-76651 is classified under CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') (The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.).
How can I check Maven dependencies for CVE-2026-76651?
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-wqxh-m9g7-9pc2",
  "modified" : "2026-08-29T00:31:03Z",
  "published" : "2026-08-29T00:31:03Z",
  "aliases" : [ "CVE-2026-76651" ],
  "details" : "A buffer\noverflow vulnerability exists in the embedded HTTP service in TL-WR841N v14 when processing\nmultipart/form-data requests. Insufficient validation of an attacker-controlled\nboundary parameter may allow a remote unauthenticated attacker to submit a\ncrafted request that corrupts memory by overwriting data beyond the bounds of\nan internal buffer.\n\n\n\n\n\n\n\n\n\nSuccessful\nexploitation may result in modification or corruption of process memory,\npotentially leading to undefined application behavior. Arbitrary code\nexecution, information disclosure, and denial-of-service conditions have not\nbeen demonstrated.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/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-2026-76651"
  }, {
    "type" : "WEB",
    "url" : "https://www.tp-link.com/en/support/download/tl-wr841n/v14/#Firmware"
  }, {
    "type" : "WEB",
    "url" : "https://www.tp-link.com/us/support/download/tl-wr841n/v14/#Firmware"
  }, {
    "type" : "WEB",
    "url" : "https://www.tp-link.com/us/support/faq/5270"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-120" ],
    "severity" : "MODERATE",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-08-28T22:16:53Z"
  }
}