---
type: Person
title: Rahel Zimmer
description: External auditor at Halden Audit Partners who led Nordvane Systems GmbH's
  Q3 2025 penetration test review.
tags:
- security
- penetration-test
- audit
resource: raw/meeting-notes-security-review.md
timestamp: '2026-07-16T14:27:39Z'
citadel_version: 0.3.0
---

Rahel Zimmer is an external auditor from [Halden Audit Partners](../organizations/halden-audit-partners.md)
who attended the [Nordvane Q3 2025 Security Review](../projects/nordvane-q3-2025-security-review.md)
meeting on 12 September 2025.[^s1] She walked the room through the annual external penetration test
that Halden carried out against Nordvane's production estate between 25 August and 5 September
2025.[^s2] Zimmer reported three medium-severity findings and no high- or critical-severity
findings, and stated that none of the three were individually exploitable to account takeover, but
that the first two together would shorten a brute-force campaign and should be treated as a
pair.[^s3] She will re-test the rate-limiting and error-page fixes before sign-off.[^s4]

## See also

- [Halden Audit Partners](../organizations/halden-audit-partners.md)
- [Nordvane Systems GmbH](../organizations/nordvane-systems-gmbh.md)
- [Nordvane Q3 2025 Security Review](../projects/nordvane-q3-2025-security-review.md)

## Sources

[^s1]: [meeting-notes-security-review.md](../../raw/meeting-notes-security-review.md), lines 3-10 — meeting header (ingested 2026-07-16)
[^s2]: [meeting-notes-security-review.md](../../raw/meeting-notes-security-review.md), § 1. Scope of this review (ingested 2026-07-16)
[^s3]: [meeting-notes-security-review.md](../../raw/meeting-notes-security-review.md), § 2. Findings summary (ingested 2026-07-16)
[^s4]: [meeting-notes-security-review.md](../../raw/meeting-notes-security-review.md), § 4. Remediation owners and dates (ingested 2026-07-16)
