Hardware and Software Technology Review

PCI DSS 4.0.1 Requirement 12.3.4 requires you to review all hardware and software technologies in use at least annually, confirm they still receive timely vendor security fixes, and maintain a dated remediation plan for anything outdated or end-of-life. Operationalize this by maintaining a complete technology inventory, mapping support status, and tracking remediation to closure with evidence. ¹

Key takeaways:

• You need an annual, documented technology review tied to vendor support and security fix availability. ¹
• You must produce a time-bound remediation plan for outdated or end-of-life technologies, not just identify them. ¹
• Auditors will expect proof of operation: inventory, support checks, decisions, tickets, and closure evidence. ¹

This requirement is about preventing “known-bad and getting worse” technology from quietly persisting in environments that can affect payment data security. You are expected to periodically step back, look across the technologies you run (hardware, operating systems, databases, network/security appliances, and software platforms), and verify a basic condition: the vendor still supports them with security fixes, delivered promptly. ¹

For a CCO, Compliance Officer, or GRC lead, the fastest way to make this real is to treat it as an inventory-driven control with a repeatable review workflow, clear decision criteria, and closure tracking. The “annual review” is not a calendar event you check off; it is an evidence package you can hand to a QSA or internal audit that shows: (1) what technologies exist, (2) their support status, (3) which ones are outdated or end-of-life, and (4) a plan with timeframes to remediate. ¹

If you can’t reliably answer “What technologies are in scope and are they still supported?”, you will struggle to defend patching, secure configuration, and vulnerability management results during PCI assessment. This page gives you requirement-level steps and the artifacts to retain so you can operationalize quickly.

Regulatory text

Requirement: “Hardware and software technologies in use are reviewed at least once every 12 months, including analysis that the technologies continue to receive security fixes from vendors promptly and a plan with an identified timeframe to remediate outdated technologies, including those for which vendors have announced end of life.” ¹

Operator interpretation (what you must do):

1. Run a technology review at least annually covering the technologies you use, not a sample. ¹
2. Analyze vendor support and security fix availability for each technology (or each defined technology family/version), with enough detail to show you confirmed ongoing fix delivery. ¹
3. Identify outdated and end-of-life (EOL) technologies explicitly, including those with announced EOL dates. ¹
4. Create and maintain a plan with timeframes to remediate each outdated/EOL item; “we will address later” will not test well. ¹

Plain-English requirement summary

You must periodically prove that the technology you run is still supportable from a security standpoint. If a vendor no longer provides security fixes, or the technology is outdated, you need a documented replacement/upgrade plan with an identified timeframe and follow-through evidence. ¹

Who it applies to (entity and operational context)

Entities: Merchants and service providers that store, process, or transmit account data, and service providers whose people, processes, or systems can affect the security of the cardholder data environment (CDE). ¹

Operational context (what’s typically “in scope” for this review):

• CDE systems and security components that protect the CDE (firewalls, WAF, IDS/IPS, EDR, SIEM, HSMs).
• Connected systems that can impact the CDE (jump servers, identity providers, logging infrastructure).
• Core software stacks: OS versions, hypervisors, container runtimes, databases, web servers, application frameworks, payment applications, and critical internal services.
• Third-party-provided technology you run (appliances and hosted platforms) where you can validate support status and remediation plans even if patching is performed by the third party.

Practical scoping rule: if the asset is in your PCI scope, or can affect the security of PCI scope, it belongs in the technology review inventory.

What you actually need to do (step-by-step)

Step 1: Build the “technologies in use” inventory you can defend

Create a technology inventory that is version-aware. Asset inventories that only list “Linux” or “Firewall” are not enough to validate fix availability.

Minimum fields (recommended):

• Technology name (product)
• Vendor
• Edition/license tier (if it impacts support)
• Version/build
• Deployment model (on-prem, cloud, SaaS you manage, appliance)
• Business owner and technical owner
• Environment(s) (prod, dev, DR) and PCI relevance (CDE / connected-to-CDE / security component)
• Support status (supported, extended support, EOL)
• Source of truth link (CMDB, cloud inventory, endpoint tool)

Where teams get stuck: they inventory “assets” but the requirement asks about “technologies.” Build a roll-up view that groups assets into technology/version families for review.

Step 2: Define what “receives security fixes promptly” means for your program

The requirement requires analysis that vendors continue to provide security fixes promptly. ¹

Make this measurable in your review template:

• Identify the vendor’s published patch/security advisory channel for the technology.
• Record the vendor support lifecycle page (or contract terms for proprietary vendors).
• Record whether the version is within standard support or only extended support.
• Document any constraints (e.g., appliance requires vendor-managed patch cadence; SaaS patches are opaque but vendor attests to ongoing security maintenance).

You are not required by this text to prove patch SLAs, but you should be able to show that security fixes are available and you have a realistic way to receive and apply them. ¹

Step 3: Run the annual review meeting/workflow with decision outputs

Treat the annual review as a controlled workflow with named approvers (IT, Security, and the system/technology owners).

For each technology/version family, decide:

• Keep (supported and receiving security fixes)
• Upgrade (supported but outdated; risk accepted only with documented plan)
• Replace (EOL announced or already EOL)
• Retire (no longer needed)

Document the rationale and the evidence you used to verify lifecycle/support.

Step 4: Produce a remediation plan with identified timeframes, then execute

You must have “a plan with an identified timeframe to remediate outdated technologies, including those for which vendors have announced end of life.” ¹

Turn findings into tracked work:

• Create remediation epics/tickets for each outdated/EOL technology.
• Record target completion timeframe, dependencies, and interim risk controls (if any).
• Assign accountable owner.
• Track status to closure; preserve closure evidence (upgrade completion, decommission record, or replacement implementation).

A plan that never results in tickets is hard to defend.

Step 5: Keep your evidence package “assessment-ready”

Bundle artifacts so a QSA can test quickly:

• Technology inventory export + date stamp
• Completed annual review report (findings + decisions)
• Vendor support verification evidence
• Remediation plan with timeframes
• Ticket list with statuses and closures

If you use Daydream, treat this as a recurring control with mapped evidence requests to technology owners. Daydream can track the review cadence, collect support lifecycle proofs, and keep remediation tickets linked to the requirement so you can answer assessor questions without rebuilding the story each year.

Required evidence and artifacts to retain

Keep these in a single folder/workspace per review cycle:

Core artifacts

• Annual technology review report (signed/approved)
• Technology inventory snapshot used for the review
• Support/EOL verification per technology (screenshots, vendor lifecycle pages, contracts, or advisory links)
• Remediation plan with identified timeframes for each outdated/EOL technology ¹
• Change records, upgrade completion evidence, or decommission approvals

Operational proof

• Tickets/epics with owners, milestones, and closure notes
• Exceptions/risk acceptances (if you allow them) with compensating controls and expiry dates aligned to the remediation plan

Common exam/audit questions and hangups

Auditors and QSAs tend to probe the same seams:

1. “Show me the last annual review and the full list of technologies in use.” Expect sampling against your CMDB/cloud inventory. ¹
2. “How did you verify vendor support and security fix availability?” Bring lifecycle pages, contracts, or vendor advisories. ¹
3. “Which technologies are outdated or EOL, and what is your remediation timeframe?” The plan needs dates/timeframes, owners, and status. ¹
4. “Prove you executed the plan.” Closed changes, version upgrades, or retirement evidence.
5. “What about appliances and third-party-managed platforms?” You still need evidence that security fixes are provided and a plan exists if EOL is announced. ¹

Frequent implementation mistakes (and how to avoid them)

Mistake	Why it fails	Fix
Inventory lists assets but not versions	You can’t prove support/fix status without versions	Add version/build and vendor lifecycle reference per technology family
Annual review is a slide deck with no remediation plan	Requirement explicitly calls for a plan with timeframes 1	Convert findings into owned tickets with target dates and milestones
EOL identified but “accepted” indefinitely	The requirement expects remediation planning, not permanent deferral 1	Require exception expiry tied to upgrade/replace timeline
“SaaS is out of scope” logic	If it can affect CDE security, it belongs in review applicability 1	Include SaaS you manage/admin; collect support attestations/contract evidence
Evidence is scattered across teams	Assessments slow down and gaps appear	Centralize artifacts per review cycle; map each technology to proof

Enforcement context and risk implications

No public enforcement cases were provided in the source catalog for this requirement. Practically, the risk is straightforward: unsupported technology accumulates unpatched vulnerabilities, and you lose the ability to show “security fixes from vendors” are available and planned for, which undermines multiple PCI expectations during assessment testing. ¹

Practical execution plan (30/60/90)

You asked for fast operationalization. Use this as a working plan; adjust to your environment’s change windows.

First 30 days: Establish scope, inventory, and workflow

• Name an owner for the review (Security/GRC) and technology approvers (IT Ops, Infrastructure, App owners).
• Produce the first version-aware inventory snapshot for in-scope technologies.
• Create a standard review template: support status, fix channel, EOL date, decision, remediation action, timeframe. ¹
• Pick the evidence standard (what is acceptable proof of vendor support).
• Stand up a tracking board (tickets/epics) to capture remediation actions and owners.

By 60 days: Complete the review and publish the remediation plan

• Execute the review across technology families; record support validation evidence.
• Identify outdated/EOL items and draft the remediation plan with timeframes and accountable owners. ¹
• Open remediation tickets and align them to change management.
• Brief leadership on any EOL items that require budget or major architectural changes.

By 90 days: Start remediation and harden “audit readiness”

• Complete early, low-risk upgrades (point releases, supported configuration changes).
• For major upgrades/replacements, document dependencies and interim controls, then keep status updated.
• Package evidence in an assessor-ready folder: inventory snapshot, review report, support proofs, remediation plan, ticket exports.
• Add the annual review as a recurring compliance task with automated reminders and evidence collection (this is where Daydream reduces manual chase-down).

Frequently Asked Questions

Does PCI DSS 12.3.4 require reviewing every single asset?

The text requires reviewing “hardware and software technologies in use,” which is best met by reviewing technology/version families with an inventory that can be traced back to assets. Keep your roll-up defensible with inventory snapshots. ¹

What counts as “outdated” if the vendor hasn’t declared end of life?

Treat “outdated” as versions outside the vendor’s normal security support or versions that no longer receive security fixes promptly. Document the vendor source you used and your decision rule in the review record. ¹

How do we handle SaaS or cloud services where we don’t patch the underlying platform?

Include the technology if it can affect the security of the CDE, then collect evidence that the provider continues to supply security fixes (contract terms, lifecycle statements, advisory programs) and document your plan if the provider announces EOL for a relevant component. ¹

Is a remediation plan required even if the EOL date is far out?

Yes. The requirement calls for “a plan with an identified timeframe” for outdated technologies, including those with announced EOL. You can set timeframes that align to change windows, but they must be explicit. ¹

What evidence is most persuasive to a QSA?

A dated review report tied to an inventory snapshot, plus vendor lifecycle/support proofs and remediation tickets that show ownership and progress. QSAs look for operational proof more than narrative. ¹

Can we meet this with a policy statement alone?

A policy helps, but the requirement is operational: you must perform the annual review, analyze support and fix availability, and maintain a time-bound remediation plan with evidence. Retain artifacts that show it happened. ¹

What you actually need to do

Use the cited implementation guidance when translating the requirement into day-to-day operating steps. ²

Footnotes

1. PCI DSS v4.0.1 Requirement 12.3.4

2. Just Published: PCI DSS v4.0.1