---
title: "Security digest: September 25, 2026"
url: https://erroneo.us/security/2026-09-25/
description: "September 25, 2026 vulnerability digest: 3 CISA KEV additions (Microsoft, MikroTik, WordPress); 1 critical advisory (Composer (PHP)). What to patch and who…"
type: security-digest-day
section: "Security Digest"
date_published: 2026-09-25
date_modified: 2026-09-25
publisher: erroneo.us
author: erroneo.us Security Desk
license: All rights reserved. Quote with attribution and a link.
---

# Security digest: September 25, 2026

3 known exploited (cisa kev) additions and 1 critical advisory.

## Take stock

- Do you run any of these? WordPress Core, MikroTik RouterOS, Microsoft SharePoint. They are being exploited in the wild (CISA KEV). Patch or mitigate if you do; CISA’s federal deadline is 2026-09-28.
- Composer (PHP): 1 critical advisory ( fof/oauth ). Check with composer audit .
- None of it touches your stack? Then there is nothing to do today. That is a result, not a failure to read carefully.

## Known exploited (CISA KEV)

- [CVE-2026-87902](https://erroneo.us/security/cve/CVE-2026-87902/index.md) WordPress Core: WordPress Core Remote File Inclusion Vulnerability (CISA due 2026-09-28)
- [CVE-2026-67279](https://erroneo.us/security/cve/CVE-2026-67279/index.md) MikroTik RouterOS: Mikrotik RouterOS Improper Enforcement of Behavioral Workflow Vulnerability (CISA due 2026-09-28)
- [CVE-2026-65660](https://erroneo.us/security/cve/CVE-2026-65660/index.md) Microsoft SharePoint: Microsoft SharePoint Code Injection Vulnerability (CISA due 2026-09-28)

## Critical advisories

- [CVE-2026-92161](https://erroneo.us/security/cve/CVE-2026-92161/index.md) FriendsOfFlarum OAuth: Unauthenticated account takeover via unverified email trust in Discord OAuth provider — Composer (PHP) fof/oauth < 1.7.4 → 1.7.4; Composer (PHP) fof/oauth >= 2.0.0-beta.1, < 2.0.0-beta.4 → 2.0.0-beta.4

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Source page: https://erroneo.us/security/2026-09-25/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt