Security bulletins Warnings and recommendations from national cyber security agencies, newest first. Each brief is at most 120 words, bottom line first, and links to the publication it was written from.
All sources BSI (DE) warning CERT Polska warning CERT-EU advisory CERT-SE advisory CISA advisory CISA alert MAS (SG) guidelines NCSC (UK) guidance NCSC (UK) news NSM (NO) warning SAMSIK (DK) news BSI (DE) · Warning · 06 Feb 2026
Gemeinsamer Sicherheitshinweis (BfV und BSI) - Phishing über Messengerdienste Read the original at www.bsi.bund.de ↗ (in German)
BSI (DE) · Warning · 29 Jan 2026
Version 1.2: Fortinet - Zero-Day Schwachstelle gefährdet Fortinet-Lösungen mit SAML SSO Read the original at www.bsi.bund.de ↗ (in German)
BSI (DE) · Warning · 16 Jan 2026
Version 1.1: Cisco Secure Email - Lösungen werden aktiv angegriffen Read the original at www.bsi.bund.de ↗ (in German)
BSI (DE) · Warning · 29 Dec 2025
Version 1.0: MongoDB - Aktiv ausgenutzte Schwachstelle erlaubt Offenlegung sensibler Daten Read the original at www.bsi.bund.de ↗ (in German)
BSI (DE) · Warning · 19 Dec 2025
Version 1.0: WatchGuard Firebox - Aktive Ausnutzung einer Zero-Day Schwachstelle Read the original at www.bsi.bund.de ↗ (in German)
BSI (DE) · Warning · 15 Dec 2025
Version 1.3 React Server Components - Kritische Schwachstelle bedroht zahlreiche Webanwendungen Read the original at www.bsi.bund.de ↗ (in German)
NCSC (UK) · Guidance · 10 Dec 2025
Provisioning and managing certificates in the Web PKI Read the original at www.ncsc.gov.uk ↗
CISA · Advisory · 05 Dec 2025
Pro-Russia Hacktivists Conduct Opportunistic Attacks Against US and Global Critical Infrastructure Read the original at www.cisa.gov ↗
NCSC (UK) · Guidance · 03 Dec 2025
New Vulnerability Monitoring Service (VMS) from GDS now available in MyNCSC Read the original at www.ncsc.gov.uk ↗
NCSC (UK) · Guidance · 24 Nov 2025
Choosing a managed service provider (MSP) Read the original at www.ncsc.gov.uk ↗
BSI (DE) · Warning · 28 Oct 2025
Version 1.0: BIND - Proof of Concept bedroht DNS-Server Read the original at www.bsi.bund.de ↗ (in German)
BSI (DE) · Warning · 28 Oct 2025
Version 1.0: Microsoft Exchange - Gefährdung für zehntausende Server nach Support-Ende für Versionen 2016 und 2019 Read the original at www.bsi.bund.de ↗ (in German)
BSI (DE) · Warning · 27 Oct 2025
Version 1.1: Microsoft WSUS - Notfallupdate schließt kritische Schwachstelle mit Proof-of-Concept Read the original at www.bsi.bund.de ↗ (in German)
BSI (DE) · Warning · 16 Oct 2025
Version 1.0: F5 - Informationen über Schwachstellen abgegriffen Read the original at www.bsi.bund.de ↗ (in German)
BSI (DE) · Warning · 09 Oct 2025
Version 1.0: SonicWall - Konfigurationsinformationen von Firewalls abgegriffen Read the original at www.bsi.bund.de ↗ (in German)
BSI (DE) · Warning · 07 Oct 2025
Version 1.0: Redis - Kritische Schwachstelle gefährdet Redis-Server Read the original at www.bsi.bund.de ↗ (in German)
CISA · Advisory · 22 Sep 2025
CISA Shares Lessons Learned from an Incident Response Engagement Read the original at www.cisa.gov ↗
NCSC (UK) · Guidance · 18 Sep 2025
External attack surface management (EASM) buyer's guide Read the original at www.ncsc.gov.uk ↗
BSI (DE) · Warning · 27 Aug 2025
Version 1.0: Citrix NetScaler ADC und NetScaler Gateway: Angriffe auf ungeschützte Instanzen Read the original at www.bsi.bund.de ↗ (in German)
BSI (DE) · Warning · 07 Aug 2025
Version 1.1: SonicWall Gen 7 Firewalls - Ransomware-Angriffe beobachtet Read the original at www.bsi.bund.de ↗ (in German)