Nine

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First seenAug 17, 2026
Last mentionedAug 17, 2026

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DDoS Attacks Cause Major Threema Outages

Sustained distributed denial-of-service attacks knocked Swiss secure messenger Threema offline for hours before upstream filtering restored service; On-Prem users unaffected.

Security AffairsAug 17, 07:15 UTC · Aug 17, 2026Threat actorExploited1 · 1 read

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Ninevendor · 1
Threemavendor · 1
Threemaorganization · 1
Threemavictim · 1

Entities are extracted by the model from each article. First seen Aug 17, 2026, last mentioned Aug 17, 2026. Watching keeps it in this browser only (no account); the watchlist page and dashboard alerts use it.