---
title: "Security digest: December 19, 2025"
url: https://erroneo.us/security/2025-12-19/
description: "December 19, 2025 vulnerability digest: 1 brief (MongoBleed); 1 CISA KEV addition (WatchGuard). What to patch and who can relax."
type: security-digest-day
section: "Security Digest"
date_published: 2025-12-19
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: December 19, 2025

1 editorial brief and 1 known exploited (cisa kev) addition.

## Take stock

- Patch this week: MongoBleed . Anyone running self-managed MongoDB 3.6 through 8.2.2, especially instances reachable from the internet or from shared or untrusted networks.
- Do you run any of these? WatchGuard Firebox. They are being exploited in the wild (CISA KEV). Patch or mitigate if you do; CISA’s federal deadline is 2025-12-26.
- 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

- **Patch this week** [MongoBleed: Pre-Auth Memory Leak in MongoDB Server](https://erroneo.us/security/briefs/mongobleed-mongodb-zlib-memory-leak/index.md): Atlas users are already patched; self-hosted MongoDB that untrusted networks can reach must be upgraded (or have zlib disabled) now, and internet-exposed instances should rotate credentials.

## Known exploited (CISA KEV)

- [CVE-2025-14733](https://erroneo.us/security/cve/CVE-2025-14733/index.md) WatchGuard Firebox: WatchGuard Firebox Out of Bounds Write Vulnerability (CISA due 2025-12-26)

## Critical advisories

None.

---
Source page: https://erroneo.us/security/2025-12-19/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt