Monthly Security Update
March 2026 // V1.2
UNKNOWN
MONTHLY
SECURITY
UPDATE
Engineering Progress & Risk Mitigation Report
PHASE_COMPLETION: WORK_SHIPPED
- 01
MFA Enforcement Complete
100% coverage across all 18 accounts. All admin accounts upgraded to phishing-resistant MFA via security keys. Legacy authentication protocols fully blocked — no password-only access paths remain.
- 02
DMARC at Reject
Policy advanced to full enforcement. Aggregate report analysis identified one unauthorized sending source (Mailchimp) that was not SPF/DKIM aligned — source blocked, no legitimate email impacted.
- 03
Account Hygiene Completed
All 8 stale accounts remediated (3 deprovisioned, 5 reactivated with MFA). All orphaned accounts assigned documented owners. Service account inventory tagged. Admin count reduced from 6 to 4.
- 04
Material Security & Browser Hardening
Material Security enrolled on all 18 mailboxes for inbox-level threat protection. Chrome browser policies deployed via Google Admin: extension blocklist active, Safe Browsing enhanced, auto-update enforced, incognito mode disabled.
RESILIENCE_GAP_REDUCTION
March marked the completion of the Quickstart engagement. All six security controls are now deployed and verified. MFA coverage reached 100% with zero legacy authentication paths remaining — the single highest-impact change, eliminating credential-only access across the entire organization. The DMARC journey from no record to reject policy in under two weeks was enabled by a clean domain with no legacy sending infrastructure, though the discovery of an unauthorized Mailchimp sender during aggregate report analysis validated the monitoring approach. DNS filtering continued to block over 1,100 malicious queries per month. The organization's security posture has shifted from zero formal controls to a documented, code-managed, and continuously monitored baseline — ready for cyber insurance renewal and investor due diligence.
SYSTEM_METRIC_MATRIX
| METRIC | PREVIOUS | CURRENT | CHANGE | NOTES |
|---|---|---|---|---|
| Account Inventory & Hygiene | ||||
| Accounts Inactive >45 Days | 3 | 0 | ↓ 3 | 3 stale accounts disabled during monthly cleanup |
| Password & Auth Policies | ||||
| Accounts with Default / Empty Passwords | 0 | 0 | — | Credential report clean |
| MFA Enforcement | ||||
| Admin Phishing-Resistant MFA | 80% | 100% | ↑ 20% | FastPass / FIDO2 enforced for all admins |
| Break-Glass Account Integrity | ✓ | ✓ | — | Account exists, MFA enrolled, credentials vaulted |
| Browser Hardening | ||||
| Chrome Version Compliance | 97% | 100% | ↑ 3% | 2 devices updated after policy enforcement |
| Email Security & DMARC | ||||
| DMARC Pass Rate | 98.2% | 98.7% | ↑ 0.5% | Aggregate report reviewed — no unauthorized senders |
| DMARC Policy | reject | reject | — | No policy regressions detected |
| DNS & Web Filtering | ||||
| DNS Blocks This Month | 1,240 | 1,187 | ↓ 53 | Normal range — no spike indicators |
| Endpoints on Cloudflare Gateway DNS | 100% | 100% | — | All enrolled devices enforcing DoH |
| Email Security & DMARC | ||||
| External Forwarding Rules | 0 | 0 | — | No new rules detected |
| MFA Enforcement | ||||
| Legacy Auth Connections Permitted | 1 | 0 | ↓ 1 | Legacy auth blocked via policy |
| MFA Enrolment Rate | 95% | 100% | ↑ 5% | All active accounts enrolled |
| Account Inventory & Hygiene | ||||
| Monthly Cleanup Run Completed | ✓ | ✓ | — | Run completed on schedule |
| Orphaned Accounts | 1 | 0 | ↓ 1 | Former contractor account removed |
| Password & Auth Policies | ||||
| Password Policy Compliance | 100% | 100% | — | All platforms enforcing policy |
| Account Inventory & Hygiene | ||||
| Service Accounts Without Owner | 0 | 0 | — | All service accounts tagged |
| Password & Auth Policies | ||||
| Session Timeout on Admin Accounts | 100% | 100% | — | No policy drift detected |
| Account Inventory & Hygiene | ||||
| Total Admin Account Count | 4 | 4 | — | No change — full justification review at next quarterly |
| Browser Hardening | ||||
| Unapproved Extensions Installed | 0 | 0 | — | Extension blocklist active on all managed browsers |