These are the 5 security notices from 23 December 2025 until 28 December 2025

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1. MongoDB security advisory (AV25‑862) – 24 December 2025

View advisory on Cyber Centre

Severity: Critical (as indicated in the original notice)
Recommended actions:

• Apply the MongoDB patch released on 24 December 2025.
• Verify that all MongoDB instances are running the updated version.
• Review access controls and ensure only authorized users can connect.

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2. TeamViewer security advisory (AV25‑861) – 23 December 2025

View advisory on Cyber Centre

Severity: High
Recommended actions:

• Install the latest TeamViewer update.
• Enforce two‑factor authentication for all remote sessions.
• Audit active connections and terminate any suspicious sessions.

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3. VMware security advisory (AV25‑860) – 23 December 2025

View advisory on Cyber Centre

Severity: High
Recommended actions:

• Deploy the VMware security patch promptly.
• Review VM configurations for unnecessary exposure to the internet.
• Conduct a vulnerability scan of the virtual environment.

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4. Ubuntu security advisory (AV25‑859) – 23 December 2025

View advisory on Cyber Centre

Severity: Moderate to High (depends on affected packages)
Recommended actions:

• Update all Ubuntu systems using apt-get update && apt-get upgrade.
• Check for any lingering vulnerable packages with ubuntu-security-status.
• Apply kernel hardening recommendations where applicable.

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5. Red Hat security advisory (AV25‑858) – 23 December 2025

View advisory on Cyber Centre

Severity: Critical for enterprise deployments
Recommended actions:

• Apply the Red Hat patch via yum update or dnf update.
• Verify that the updated packages are correctly installed on all servers.
• Review SELinux policies and audit logs for any anomalous activity.

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How Azzurro Technology Inc. can help

Azzurro Technology Inc. can assist your organization with any of the above advisories—or with any other software issue you may face. Our team offers free, no‑obligation advice and can provide a free quote for a more detailed, customized security report.

✉️ Contact us: mailto:info@azzurro.tech

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Disclaimer

This post is an AI‑generated summary of the advisories listed on the Canadian Cyber Centre. For complete details, please visit the official advisory pages linked above or the main page at https://www.cyber.gc.ca/en/alerts-advisories. Azzurro Technology Inc. can provide a free quote for a tailored report specific to your organization’s needs.