Calendar Chaos: How Sneaky Subscriptions Are a New Cybersecurity Nightmare
Threat actors are taking event planning to a new low, exploiting digital calendar subscriptions to sneak harmful content onto your devices. BitSight’s research reveals that deceptive infrastructures are using expired domains to trick users into subscribing to malicious notifications, turning your calendar into a security blind spot. Time to RSVP “no thanks!”

Hot Take:
Who knew that your digital calendar subscription could double as a Trojan horse? It turns out that your harmless subscription to German holidays might just be a front for phishing attacks and malware. So much for looking forward to Oktoberfest—unless you really enjoy malware cocktails!
Key Points:
- Threat actors manipulate calendar subscriptions to deliver harmful content.
- Malicious subscriptions often use expired or hijacked domains.
- Risks include phishing, malware distribution, and JavaScript execution.
- BitSight research uncovered 347 suspicious calendar domains.
- Calendar subscriptions are a security blind spot compared to email.
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