Spammers Exploit ASCII Smuggling to Bypass AI Email Filters

What happened

Cybercriminals have adopted the ASCII smuggling technique, embedding invisible Unicode characters in emails to evade AI-based spam and phishing filters. This has led to a surge in spam and phishing attacks, as AI systems fail to detect malicious content, causing harm to users and communities. Microsoft researchers reported a significant increase in such incidents.

Reported impact

Affected parties

Not publicly disclosed

Harm type

Not publicly disclosed

Scale

Not publicly disclosed

Financial impact

Not publicly disclosed

Regulatory action

Not publicly disclosed

Classification

Organization

Not publicly disclosed

AI system

Not publicly disclosed

Industry

Not publicly disclosed

Country

Not publicly disclosed

Provider

Not publicly disclosed

Incident type

Not publicly disclosed

Relevant governance controls

Governance control mapping is not available for this record.

• No controls mappedNot publicly disclosed

Control mapping is analytical. It does not state that any control would have prevented the incident.

Sources and evidence