---
title: "Security digest: August 6, 2025"
url: https://erroneo.us/security/2025-08-06/
description: "August 6, 2025 vulnerability digest: 1 brief (Exchange Hybrid CVE-2025-53786: On-Prem to Cloud…). What to patch and who can relax."
type: security-digest-day
section: "Security Digest"
date_published: 2025-08-06
date_modified: 2026-10-21
publisher: erroneo.us
author: erroneo.us Security Desk
license: All rights reserved. Quote with attribution and a link.
---

# Security digest: August 6, 2025

1 editorial brief.

## Take stock

- Check exposure: Exchange Hybrid CVE-2025-53786: On-Prem to Cloud Escalation . Organizations that run, or ever ran, Exchange hybrid or OAuth between on-premises Exchange Server and Exchange Online.
- None of it touches your stack? Then there is nothing to do today. That is a result, not a failure to read carefully.

## Editorial briefs

- **Check exposure** [Exchange Hybrid CVE-2025-53786: On-Prem to Cloud Escalation](https://erroneo.us/security/briefs/exchange-hybrid-cve-2025-53786-privilege-escalation/index.md): Not known to be exploited and requires on-prem Exchange admin first, but it turns any on-prem compromise into a quiet cloud takeover, so verify the dedicated hybrid app is in place and the old shared credential is gone.

## Known exploited (CISA KEV)

None.

## Critical advisories

None.

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Source page: https://erroneo.us/security/2025-08-06/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt