---
title: "Security digest: July 19, 2025"
url: https://erroneo.us/security/2025-07-19/
description: "July 19, 2025 vulnerability digest: 1 brief (ToolShell). What to patch and who can relax."
type: security-digest-day
section: "Security Digest"
date_published: 2025-07-19
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: July 19, 2025

1 editorial brief.

## Take stock

- Check exposure: ToolShell . Owners of on-premises SharePoint Server 2016, 2019 or Subscription Edition, and anyone still running end-of-life SharePoint 2013 or older.
- 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** [ToolShell: SharePoint On-Prem Unauthenticated RCE Chain](https://erroneo.us/security/briefs/toolshell-sharepoint-cve-2025-53770/index.md): Fixes shipped in July 2025, but ToolShell stole ASP.NET machine keys that survive patching, so any on-prem SharePoint that was internet-facing then needs proof that keys were rotated and no backdoor remains.

## Known exploited (CISA KEV)

None.

## Critical advisories

None.

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Source page: https://erroneo.us/security/2025-07-19/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt