IoT Device Penetration Testing
We test connected devices end to end — firmware, hardware interfaces, wireless protocols and the cloud APIs behind them — where hardcoded secrets and insecure updates are the norm.
What is IoT Device Penetration Testing?
Connected devices combine embedded software, hardware and cloud — and usually inherit the weaknesses of all three. We test the firmware, the physical interfaces and the backend APIs together, where hardcoded secrets and insecure updates are still the norm.
A connected device is three products in one — embedded software, physical hardware and a cloud backend — and it tends to inherit the weakest security of all three. Firmware ships with hardcoded keys, debug headers stay enabled, updates go unsigned, and the cloud API trusts the device too much. We test the whole system, because a flaw in one unit often compromises the entire fleet through a shared secret or backend.
IoT testing also has to weigh fleet economics: because devices share firmware, keys and a common backend, a single recovered secret can compromise every unit in the field, and a flaw shipped in hardware can't be patched like a web app. Finding these issues before mass production or a firmware release is dramatically cheaper than a recall or a fleet-wide breach afterwards.
IoT Device Penetration Testing is a manual, exploit-driven assessment: real people attacking your target the way an adversary would, then proving each finding with a working proof of concept. It is not an automated scan with a logo on it — the point is to find and demonstrate the issues that actually put you at risk, and hand your team a clear plan to fix them.
Why it matters
Your infrastructure is probed continuously by automated adversaries. One exposed service or reused credential is often all it takes to gain a foothold — and from there, without testing, you don't know how far an attacker gets.
A iot device penetration testing engagement replaces guesswork with evidence. Instead of hoping your controls hold, you get a ranked, reproducible picture of where they don’t — before someone hostile finds the same gaps.
Industries & use cases
IoT testing is critical for consumer smart devices, medical devices, industrial sensors and automotive components — anywhere a device handles sensitive data, takes physical action, or ships at scale with a shared backend.
What we test
Manual, exploit-driven coverage focused on real impact — not scanner noise.
- Firmware extraction and analysis
- Hardware interfaces (UART, JTAG, SPI)
- Insecure wireless protocols (BLE, Zigbee)
- Hardcoded secrets and keys
- Insecure update mechanisms
- Cloud and API backend security
Signs you should run a iot device penetration testing
If any of these apply, testing is overdue.
- You're about to mass-produce or ship a firmware update
- Your device handles sensitive data or takes physical action
- Devices share a common backend or keys
- You're entering a regulated market (medical, automotive)
- You've never had the hardware and firmware tested
Common vulnerabilities we find
The issues that show up again and again in iot device penetration testing — and the ones that actually get exploited.
Hardcoded keys in firmware
Extracted firmware reveals credentials and signing keys.
Exposed hardware interfaces
UART/JTAG access yields shells and memory dumps.
Insecure update mechanism
Unsigned or unencrypted updates allow malicious firmware.
Weak or absent secure boot
Modified firmware runs because integrity isn't verified at boot.
Overtrusted device-to-cloud API
The backend trusts device-supplied data or shared keys, enabling fleet-wide attacks.
Debug interfaces left enabled
Shipping devices with active debug or diagnostic access.
Weak entropy / predictable secrets
Keys and identifiers generated with insufficient randomness.
Insecure companion-app pairing
Pairing and provisioning flows an attacker can hijack.
Example attack chain
Real impact rarely comes from one bug — it comes from chaining several. A representative example:
Why choose webhook.press
Attacker mindset
We’re offensive security people who also build the free tools bug-bounty hunters use daily. We test the way real adversaries do — and prove it.
No scanner theatre
You get findings a human exploited and verified, ranked by real business risk — not an unfiltered tool dump padded to look thorough.
Fixed price, free retest
A clear quote after scoping, a report your team and auditors can use, and a free retest to confirm the fixes hold.
Our methodology
A structured, transparent process aligned to OWASP and PTES — with a named point of contact throughout.
Scoping & rules of engagement
We agree the exact targets, depth, timing and constraints for your iot device penetration testing, and set clear rules of engagement so testing is safe and predictable.
Reconnaissance & mapping
We enumerate the full attack surface — endpoints, roles, technologies and trust boundaries — and threat-model where an attacker would focus.
Manual testing & exploitation
We attack by hand, verifying and chaining weaknesses into real impact. Automated tooling supports coverage; humans find the logic and authorization bugs it can’t.
Analysis & risk rating
Each finding is validated, rated by real business risk rather than raw scanner severity, and de-duplicated so you get signal, not noise.
Reporting
You receive an executive summary for leadership and a technical section with reproducible PoCs, evidence and concrete, stack-specific remediation.
Free retest
After you remediate, we re-test the closed findings to confirm they are actually fixed — at no extra cost.
What you get
Reproducible PoCs
Every finding ships with a working proof and step-by-step reproduction your engineers can replay and verify.
Risk-ranked findings
Prioritised by real business impact, so you fix what matters first instead of drowning in low-severity noise.
Actionable remediation
Concrete, stack-specific fixes and guidance — not generic “apply best practice” filler.
Free retest
We re-check the closed findings after remediation and confirm they’re resolved.
The report is written for two audiences at once: an executive summary that a non-technical stakeholder can act on, and a detailed technical section — findings, evidence, CVSS and reproduction — that your developers and auditors can use directly.
Manual testing, not just a scan
Automated scanners are fast and useful for coverage, but they only find patterns they already know, and they flood you with false positives. They cannot understand your business logic, chain several small issues into a breach, or tell you which alert actually matters. Our iot device penetration testing is led by experienced testers who exploit findings by hand and rank them by the damage they’d really do — the difference between a 300-page tool dump and a short list of things worth fixing.
Standards & compliance
Our iot device penetration testing reports are written to support the frameworks your auditors and customers care about — including SOC 2, ISO 27001, PCI DSS, HIPAA, GDPR, and the EU’s NIS2 and DORA. Each engagement produces clear, independent evidence of testing with scope, methodology and findings documented the way assessors expect, so the same test both hardens your systems and helps satisfy your obligations.
Frameworks we follow
Recognised methodologies, adapted to your target — never a rigid checklist.
- OWASP — Web Security Testing Guide, ASVS and the API Security Top 10
- PTES — the Penetration Testing Execution Standard
- NIST SP 800-115 — technical guide to security testing
- OSSTMM — Open Source Security Testing Methodology Manual
- MITRE ATT&CK — to frame real-world adversary techniques
FAQ
Do you need physical devices?
Yes — send us units to test. Firmware images help too.
Do you test the mobile app and cloud?
Yes — the companion app and backend are usually where the impactful bugs are.
Do you need physical devices?
Yes — send us units to test; firmware images and hardware documentation help too.
Do you test the companion app and cloud?
Yes — the mobile app and backend API are usually where the highest-impact findings are.
When is the best time to test?
Before mass production and before major firmware releases, when fixes are cheapest and recalls are avoidable.
Do you assess the whole ecosystem?
Yes — device, firmware, hardware interfaces, companion app and cloud backend together.
How long does a iot device penetration testing take?
Most focused engagements run one to two weeks depending on scope; we agree the exact timeline during scoping.
Is a retest included?
Yes — after you remediate, we re-check the closed findings to confirm they’re fixed, at no extra cost.
How do you price it?
Per engagement, based on scope and depth — you get a fixed quote after a short scoping call. No cookie-cutter packages.
Why teams trust our iot device penetration testing
Aligned to recognised standards
Testing follows OWASP, PTES, NIST SP 800-115 and MITRE ATT&CK, and reports support SOC 2, ISO 27001, PCI DSS, HIPAA, GDPR, NIS2 and DORA.
Every engagement includes
Reproducible PoCs, risk-ranked findings, concrete remediation, a named point of contact, a free retest, and a summary letter of attestation.
Confidential by default
Work is covered by an NDA, scoped with clear rules of engagement, and data is handled with care throughout — including residency requirements.
Sample report available on request — see our reporting format and depth before you commit. Ask for a sample →
Get a quote for IoT Device Penetration Testing
Tell us about the target — we’ll come back with scope and a fixed price. Manual, exploit-driven testing with reproducible proof and a free retest.