Symptom
Vulnerability scan shows critical CVEs open for 90+ days on production servers
- Root cause
- No SLA tying CVSS severity to a remediation deadline
- Business risk
- Exploitation window remains open, NIS2 reporting exposure
Managed IT · Patch Management
Managed Patch & Vulnerability Remediation
Patch management is the systematic identification, testing and deployment of software updates across servers, endpoints and applications to close known vulnerabilities within defined time targets. Evolvice operates patch management as a ring-based, SLA-driven service that ties CVE severity to remediation deadlines and coordinates maintenance windows across the estate.
- ISO 27001
- NIS2
- BSI-Grundschutz
- GDPR
Overview
Technical Overview
Patching is frequently treated as a monthly maintenance chore rather than a risk-driven process, resulting in critical CVEs sitting unpatched for months on production systems while low-risk updates get applied on schedule. Without ring-based rollout, a single bad patch can take down production; without CVE triage, teams patch by vendor cadence instead of actual exploitability. We run patching as a continuous, prioritised remediation pipeline.
What we put right
- Critical CVEs remain unpatched for 60+ days on internet-facing systems
- No ring-based rollout, so patches go straight to production without a canary group
- Patch cadence driven by vendor release schedule, not by actual CVE severity or exploitability
- Maintenance windows negotiated ad hoc per patch cycle, causing recurring downtime disputes
Diagnostic
Common Failure Modes in Patch Management
Patterns we repeatedly find when taking over an existing patch management process.
Symptom
A routine patch cycle causes an unplanned outage across multiple systems
- Root cause
- Patches deployed fleet-wide without a canary/pilot ring
- Business risk
- Production downtime, loss of confidence in patching process
Symptom
Patch compliance reporting shows conflicting numbers between teams
- Root cause
- No single source of truth for patch status across servers, endpoints and network devices
- Business risk
- Inaccurate audit evidence, unclear actual exposure
Symptom
IT and business teams dispute maintenance window timing every cycle
- Root cause
- No pre-agreed recurring maintenance window calendar
- Business risk
- Delayed patch application, recurring operational friction
Exposure
Patch management is exposure-window control, not update installation.
The value of patch management is not the act of applying an update — it is minimising the time between a vulnerability becoming known and the system being no longer exploitable through it. That requires triaging CVEs by actual exploitability and asset criticality, not applying patches in vendor release order.
We run patching through defined rings and pre-agreed maintenance windows so remediation speed and system stability are both engineered outcomes, not accidents.
Definition
CVE Triage
CVE triage is the process of assessing a published Common Vulnerabilities and Exposures entry against its CVSS severity, known exploitation status and the criticality of affected assets, to determine the remediation deadline and rollout priority.
Delivery model
How We Operate Patch Management
A repeatable five-step engagement we run for every environment we take over.
- 1
Asset & Patch Baseline Audit
Inventory of all patchable assets, current patch levels and outstanding CVEs, consolidated into a single source-of-truth compliance view.
- 2
CVE Triage & SLA Definition
Remediation SLAs defined per CVSS severity band and asset criticality (e.g. critical internet-facing within 72 hours), agreed with the customer.
- 3
Ring-Based Rollout Design
Patch rings established (pilot, early adopter, broad, critical infrastructure) with automated promotion gates based on stability signals.
- 4
Maintenance Window Coordination
A recurring, pre-agreed maintenance window calendar per system tier, eliminating ad hoc scheduling disputes.
- 5
Continuous Compliance Reporting
Monthly patch compliance and CVE exposure reporting against agreed SLAs, feeding directly into audit and NIS2 evidence packages.
Compliance
Compliance Mapping — Patch Management
How our delivery model maps to the four reference frameworks German enterprises are audited against.
| Control | ISO 27001 | NIS2 | BSI-Grundschutz | GDPR |
|---|---|---|---|---|
| Technical Vulnerability Management | A.8.8 | Art. 21(2)(e) | OPS.1.1.3 | Art. 32(1)(b) |
| Change Management for Patching | A.8.32 | Art. 21(2)(b) | OPS.1.1.6 | Art. 32(1)(b) |
| Asset Inventory Accuracy | A.5.9 | Art. 21(2)(c) | CON.9 | Art. 30 |
| Incident Reporting for Unpatched Exploits | A.5.24 | Art. 23 | DER.2.1 | Art. 33 |
| Test Environment / Ring Rollout | A.8.31 | Art. 21(2)(e) | OPS.1.1.6.A11 | Art. 25 |
Questions & Answers
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How it works
Patch management is the process of identifying, testing, and deploying software updates across an IT estate to remediate known vulnerabilities and maintain system stability, governed by defined timelines and rollout procedures.
Working with Evolvice
In the cluster
Managed IT & End-User Support
Service desk, devices, endpoints and IT operations run to agreed SLAs for your whole workforce.
Part of our Managed IT & End-User Support practiceTalk to the Evolvice team.
We start with a 30-minute diagnostic of your current delivery — at no cost and with no sales pitch. You leave with a written summary of findings either way.