CVE-2026-12935: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-4j6v-4j5m-vgpq
Share
CWE-121
Published
Advisory Summary

CVE-2026-12935 is a HIGH security vulnerability vulnerability (CWE-121: Stack-based Buffer Overflow) affecting Software libraries in the Maven ecosystem. The weakness occurs when a stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).. Remediation is available in the latest vendor maintenance releases.

CVE-2026-12935 at a Glance

CVE Identifier CVE-2026-12935
GHSA Identifier GHSA-4j6v-4j5m-vgpq
Severity HIGH
CVSS v3.1 Base Score N/A
CWE Classification CWE-121: Stack-based Buffer Overflow
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

How to Fix CVE-2026-12935

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-2026-12935, 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-121: Stack-based Buffer Overflow, where a stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). 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

The TL-WR940N v6 router contains a vulnerability in its RTSP connection tracking module that can lead to a stack-based buffer overflow. The issue occurs when a LAN client initiates a connection to a malicious RTSP server controlled by an attacker. A specially crafted RTSP message may trigger improper memory handling within the kernel module Successful exploitation of this vulnerability may result in a denial-of-service (DoS) condition or allow remote code execution (RCE), potentially leading to full compromise of the device. This vulnerability can be exploited by an unauthenticated attacker under the device's default configuration.

References

NVD — CVE-2026-12935 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-12935
www.tp-link.com/en/support/download... WEB
https://www.tp-link.com/en/support/download/tl-wr940n/v6/#Firmware
www.tp-link.com/jp/support/download... WEB
https://www.tp-link.com/jp/support/download/tl-wr940n/v6/#Firmware
www.tp-link.com/us/support/download... WEB
https://www.tp-link.com/us/support/download/tl-wr940n/v6/#Firmware
www.tp-link.com/us/support/faq/5213 WEB
https://www.tp-link.com/us/support/faq/5213

Frequently Asked Questions

What is CVE-2026-12935?
CVE-2026-12935 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-121: Stack-based Buffer Overflow.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-12935?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-12935?
CVE-2026-12935 is classified under CWE-121: Stack-based Buffer Overflow (A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).).
How can I check Maven dependencies for CVE-2026-12935?
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-4j6v-4j5m-vgpq",
  "modified" : "2026-07-29T21:30:59Z",
  "published" : "2026-07-29T21:30:59Z",
  "aliases" : [ "CVE-2026-12935" ],
  "details" : "The\nTL-WR940N v6 router contains a vulnerability in its RTSP connection tracking\nmodule that can lead to a stack-based buffer overflow. The issue occurs when a\nLAN client initiates a connection to a malicious RTSP server controlled by an\nattacker. A specially crafted RTSP message may trigger improper memory handling\nwithin the kernel module\n\n\n\n\n\n\n\n\n\nSuccessful\nexploitation of this vulnerability may result in a denial-of-service (DoS)\ncondition or allow remote code execution (RCE), potentially leading to full\ncompromise of the device. This vulnerability can be exploited by an\nunauthenticated attacker under the device's default configuration.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/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-2026-12935"
  }, {
    "type" : "WEB",
    "url" : "https://www.tp-link.com/en/support/download/tl-wr940n/v6/#Firmware"
  }, {
    "type" : "WEB",
    "url" : "https://www.tp-link.com/jp/support/download/tl-wr940n/v6/#Firmware"
  }, {
    "type" : "WEB",
    "url" : "https://www.tp-link.com/us/support/download/tl-wr940n/v6/#Firmware"
  }, {
    "type" : "WEB",
    "url" : "https://www.tp-link.com/us/support/faq/5213"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-121" ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-07-29T19:16:44Z"
  }
}