thinQtankLABS

Device Patch Triage & Remediation: CVE-2026-2329

Triage a Critical unauthenticated-RCE finding (CVE-2026-2329) across a fleet of Grandstream GXP16xx IP phones: confirm the firmware, score it with CVSS, judge network exposure, push the fixed firmware and verify the fleet is clean.

Beginner 20 guided steps 5 tasks About 50 minutes Runs in your browser

Skills you will practice

  • Device/firmware vulnerability management
  • Fleet asset inventory
  • CVSS v3.1 scoring (network vs local)
  • Network exposure assessment
  • Firmware patch verification

Certifications this lab maps to

This lab builds hands-on skills that appear on these certification exams. thinQtank Learning runs instructor-led training camps for each — click one to see upcoming classes.

CompTIA Security+ SY0-701 Vulnerability and patch management Training at thinQtank Learning CompTIA Network+ N10-009 Network device management and hardening Training at thinQtank Learning CompTIA CySA+ CS0-003 Asset exposure and vulnerability prioritization Training at thinQtank Learning
Part of these certification lab packages: Security+ SY0-701 CySA+ CS0-003 Network+ N10-009 Certified in Cybersecurity (CC) GSEC GSEC

The scenario

You are the network analyst on call. The scanner flagged 12 Grandstream IP phones on the voice VLAN with CVE-2026-2329 — an unauthenticated remote code execution as root on the phone's web API. Some phones are reachable from the guest network. Start by understanding it.

What you will do

  1. Triage the alert4 steps

    Open the ticket · Read the scan report · Which CVE is flagged? · Read the ticket

  2. Confirm the device and firmware4 steps

    Read the device readout · What firmware is running? · Read the advisory · Is the device affected?

  3. Assess the severity4 steps

    Find the CVSS vector · Compute the base score · What is the base score? · Why Critical here?

  4. Confirm exposure and scan3 steps

    Count affected phones · Who could exploit this? · Baseline scan

  5. Remediate and verify5 steps

    Which fixed version? · Deploy the firmware · Confirm the deployed firmware · Verify with a scan · …

How this lab works

A real Linux-style console. Commands run against real files, so hashes, hex dumps and comparisons give real results.

A file browser where you can place evidence into the lab, either the file provided or one of your own.

Reset a single step, a whole task or the entire lab. The environment is rebuilt so you can try again cleanly.

Progress saves after every step. Close the tab and come back later; your files and answers are waiting.