Capabilities › CTEM
CTEM — exposure management as a continuous cycle, not an annual audit.
Only 16% of organisations have actually implemented Continuous Threat Exposure Management, even though 87% of security leaders recognise it matters. SIRI runs the full five-stage CTEM cycle — scoping, discovery, prioritisation, validation and mobilisation — as an operating programme, not a framework left on a slide.
16%Of organisations have actually implemented CTEM
87%Of security leaders recognise CTEM's importance regardless
50%Better attack-surface visibility reported by CTEM adopters
Why awareness of CTEM keeps outrunning adoption
Live tracking · scroll to see the gap between knowing and doing
The adoption gap
16% / 84%
Only 16% of organisations have implemented CTEM, while 84% have not — despite 87% of security leaders recognising its importance (2026 enterprise CTEM research).
Measurable payoff
50%
Organisations that have implemented CTEM report 50% better attack-surface visibility than non-adopters, alongside meaningfully higher security-tool adoption rates.
Complexity risk
18%
Attack rates climb from roughly 5% for organisations with 10 or fewer domains to 18% for those with 51–100 — visibility gaps widen fast as environments grow.
Defined model
5 STAGES
Gartner's CTEM model defines five stages — scoping, discovery, prioritisation, validation and mobilisation — as a continuous cycle rather than a one-time project.
Governance pull
BOARD-LEVEL
Exposure management is increasingly requested as a standing board agenda item, not just a periodic audit finding, as directors are held accountable for a defensible risk position.
Knowing about CTEM and running it are two different things
87% of security leaders agree it matters. Only 16% have actually built it.
Continuous Threat Exposure Management is Gartner's model for treating exposure as an ongoing operating cycle — not a point-in-time assessment repeated once a year. Most organisations that have heard of CTEM haven't actually implemented it as a programme, because doing so means connecting discovery, prioritisation, validation and remediation mobilisation into one continuous loop, which most security stacks aren't built to do on their own.
The five stages aren't independent projects — they're a cycle. Scoping defines what matters to the business. Discovery finds the assets and exposures within that scope. Prioritisation ranks them by actual business impact, not raw technical severity. Validation tests whether a prioritised exposure is genuinely exploitable. Mobilisation gets the fix actually implemented and confirmed. Skip any one stage and the programme degrades back into an assessment that goes stale the moment it's delivered.
CTEM adopters report 50% better attack-surface visibility than non-adopters
Alongside meaningfully higher security-tool adoption and stronger threat awareness across every measured dimension — the gap between running CTEM and not running it compounds over time. (2026 enterprise CTEM research, 128 security decision-makers.)
SIRI runs the full CTEM cycle by connecting capabilities that would otherwise sit in separate vendor relationships: SIRI Exposure handles scoping and discovery, prioritisation ranks findings by business impact, SIRI Attack validates what's genuinely exploitable, and mobilisation is tracked through to confirmed remediation — with SIRI MDR providing continuous monitoring for what can't be fully remediated.
What organisations get wrong
Four assumptions that keep CTEM a slide instead of a programme
Most CTEM gaps aren't about disagreement with the model — they're about never operationalising all five stages together.
01 — FRAGMENTATION
“We do vulnerability scanning, so we're covered”
Scanning is discovery alone — without prioritisation, validation and mobilisation connected to it, findings pile up faster than they're ever resolved.
02 — SEVERITY
“We prioritise by CVSS score”
Technical severity alone ignores business context — a critical CVSS score on an isolated test system matters less than a medium-severity finding on a system holding customer data.
03 — VALIDATION
“If the scanner flagged it, it's exploitable”
Automated tools routinely flag findings that aren't actually exploitable in context — without validation, remediation effort goes to the wrong things.
04 — FOLLOW-THROUGH
“The assessment is the deliverable”
A report handed over at the end of an assessment isn't mobilisation — without tracking through to confirmed remediation, the same findings resurface next cycle.
What SIRI's CTEM programme covers
The five Gartner-defined stages, run as one continuous cycle
Each stage connects to the next — and to SIRI Exposure, SIRI Attack and SIRI MDR.
SCOPING
Defining What Matters
Scoping the CTEM cycle around what actually matters to the business, not a generic asset list.
- Business-criticality mapping
- Attack-surface boundary definition
- Stakeholder alignment
DISCOVERY
Finding What's In Scope
Continuous discovery of assets and exposures within the defined scope.
- Continuous asset discovery
- Identity & digital exposure
- Third-party exposure
PRIORITISATION
Ranking by Business Impact
Ranking findings by actual business impact, not raw technical severity alone.
- Business-impact scoring
- Exploitability context
- Remediation-capacity-aware ranking
VALIDATION
Confirming What's Exploitable
Testing whether prioritised exposures are genuinely exploitable in your environment.
- Offensive validation testing
- Attack-path confirmation
- False-positive elimination
MOBILISATION
Getting the Fix Confirmed
Tracking remediation through to confirmed closure, not just ticket assignment.
- Remediation tracking
- Cross-team mobilisation
- Closure verification
REPORTING
Continuous Board Reporting
A current, continuously updated exposure picture for the board, not a point-in-time report.
- Live exposure dashboarding
- Board-level summaries
- Cycle-over-cycle trend tracking
Evidence, not guesswork
No exposure programme vs. point-in-time assessments vs. SIRI CTEM — what actually differs
Running an assessment and running a continuous programme are different undertakings.
| Approach | No exposure programme | Periodic point-in-time assessments | SIRI CTEM |
|---|---|---|---|
| All five CTEM stages connected | No | Rare — usually just discovery | Yes |
| Prioritisation by business impact | No | Sometimes, by severity only | Standard |
| Findings validated as exploitable | No | Rare | Standard — via SIRI Attack |
| Remediation tracked to closure | No | Inconsistent | Standard |
| Continuous, board-visible reporting | No | Point-in-time only | Continuous |
Sources: Gartner's CTEM model; 2026 enterprise CTEM research (128 security decision-makers). Summarised for comparison.
Numbers every board should know
What separates CTEM adopters from everyone else
16%
Have implemented CTEM
Of organisations, despite 87% recognising it matters.
50%
Better surface visibility
Reported by organisations that have implemented CTEM, versus non-adopters.
18%
Attack rate at scale
For organisations with 51-100 domains, up from roughly 5% at 10 or fewer.
5
Stages in one cycle
Scoping, discovery, prioritisation, validation, mobilisation — run continuously.
Compliance alignment
Standards & frameworks we align to
Our methodology is built around publicly recognised frameworks — not a proprietary checklist. Where a specific certification or attestation is completed and verified, it will be named here explicitly.
ISO/IEC 27001:2022
SOC 2 (AICPA TSC)
NIST CSF 2.0
MITRE ATT&CK
OWASP Top 10
OWASP Top 10 for LLM Applications
NIST AI RMF
ISO/IEC 42001
ISO 22301
CERT-In Directions 2022
Framework references reflect publicly available versions as of publication and describe the standards our methodology is aligned to; they are not a claim of certification, attestation, or audit completion unless stated explicitly elsewhere on this site.
Why SIRI for CTEM specifically
The full cycle, connected — not one stage sold as the whole programme
Most vendors sell discovery and call it CTEM. All five stages need to be connected for the model to actually work.
01
All five stages, one team
Scoping through mobilisation runs as one connected programme across SIRI Exposure, SIRI Attack and SIRI MDR, not five separate purchases.
02
Validated, not assumed
Prioritised findings are confirmed exploitable through real offensive testing before remediation effort is spent on them.
03
Tracked to closure
Mobilisation is tracked through to confirmed remediation, not handed off as a report at the end of an assessment.
04
Continuous by design
The cycle repeats continuously rather than resetting to zero at the start of each new assessment.
Who this is built for
Organisations SIRI's CTEM programme is built for
Enterprises with complex, multi-domain environments
Financial Services
Technology & SaaS
Organisations with more findings than remediation capacity
Boards requiring continuous exposure reporting
Multi-cloud enterprises
How we work
The five-stage cycle, run continuously
01
Scope & Discover
Defining business-critical scope and running continuous discovery within it.
Weeks 1–202
Prioritise
Ranking findings by business impact, not raw severity.
Week 203
Validate
Confirming exploitability through offensive testing via SIRI Attack.
Week 304
Mobilise & Repeat
Tracking remediation to closure, then restarting the cycle continuously.
OngoingFrequently asked
CTEM, answered directly
Isn't this the same as SIRI Exposure?
SIRI Exposure covers the scoping and discovery stages specifically. CTEM is the full five-stage operating model — it connects SIRI Exposure's discovery to prioritisation, validation through SIRI Attack, and mobilisation tracked to closure, as one continuous programme.
How is prioritisation different from a CVSS score?
Prioritisation weighs actual business impact — what the asset connects to, what data it holds, how exploitable it's confirmed to be — rather than relying on a generic technical severity score alone.
What does “validation” actually involve?
High-priority findings are tested through real offensive techniques via SIRI Attack to confirm they're genuinely exploitable in your specific environment, eliminating false positives before remediation effort is spent.
Does this replace our existing vulnerability management tooling?
No — CTEM is the operating model that connects your existing tools and processes into a continuous cycle; it typically strengthens what you already run rather than replacing it.
How is CTEM reported to the board?
As a continuously updated exposure picture rather than a point-in-time report — trends over time, prioritised findings, and validated risk, presented in terms a board can act on.
Stop resetting to zero every assessment cycle
Run exposure management as a continuous programme.
Start with scoping and discovery, or connect an existing exposure programme into the full CTEM cycle.
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