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INCIDENT 440PhishingLOW / UNDER REVIEWSourced

ASCII smuggling crosses over from AI prompt injection to phishing evasion

Invisible Unicode characters popularized for hiding instructions from AI models are now being used to obfuscate words before email filters parse them. The post ASCII smuggling crosses over from AI prompt injection to phishing evasion appeared first on Microsoft Security Blog .

Last evidence update
03 SEP 2026 · 16:00 UTC
Source count
1
Status
reported
Observation history

How this record has evolved as evidence accumulated.

04 SEP · 05:22 UTC
Initial report
Evidence