---
title: "Security digest: November 28, 2025"
url: https://erroneo.us/security/2025-11-28/
description: "November 28, 2025 vulnerability digest: 1 CISA KEV addition (OpenPLC). What to patch and who can relax."
type: security-digest-day
section: "Security Digest"
date_published: 2025-11-28
date_modified: 2025-11-28
publisher: erroneo.us
author: erroneo.us Security Desk
license: All rights reserved. Quote with attribution and a link.
---

# Security digest: November 28, 2025

1 known exploited (cisa kev) addition.

## Take stock

- Do you run any of these? OpenPLC ScadaBR. They are being exploited in the wild (CISA KEV). Patch or mitigate if you do; CISA’s federal deadline is 2025-12-19.
- 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-2021-26829](https://erroneo.us/security/cve/CVE-2021-26829/index.md) OpenPLC ScadaBR: OpenPLC ScadaBR Cross-site Scripting Vulnerability (CISA due 2025-12-19)

## Critical advisories

None.

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Source page: https://erroneo.us/security/2025-11-28/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt