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Spammers exploit invisible Unicode characters for ASCII smuggling

ASCII smuggling, a technique that uses invisible Unicode characters to obscure text, is increasingly being adopted by spammers. This method was once primarily used to bypass AI detection systems but is now being leveraged to evade spam filters. The technique involves embedding malicious content within seemingly innocuous text, making it difficult for both humans and automated systems to identify. AI

IMPACT Spammers are using AI-evasion techniques to bypass security filters, highlighting an ongoing arms race between malicious actors and defense systems.

RANK_REASON The cluster consists of social media posts discussing a security technique, rather than a primary source announcement or research paper.

Read on Mastodon — mastodon.social →

AI-generated summary · Google Gemini · from 4 sources. How we write summaries →

Spammers exploit invisible Unicode characters for ASCII smuggling

How we ranked this

Signal score
0 / 100
Composite score across the factors below. Higher = stronger signal that this story matters right now.
Newsworthiness bucket
Commentary
The cluster consists of social media posts discussing a security technique, rather than a primary source announcement or research paper.
Source corroboration
4 independent sources
Strong cross-source corroboration — multiple independent publishers covered this within the clustering window.
Topics
other
Editorial topic classification. Feeds into how the story surfaces on /topic/<slug> hub pages and into the per-entity coverage mix.
AI-industry relevance
Standard
On-topic for AI-industry coverage; kept in the public index.
Story freshness
49 days old
Aged out of breaking-news scoring windows; ranking reflects the durable signal from the full source set.
Coverage growth since scoring
+1 source(s) since last score
New sources have picked up this story since our last re-score. Score will update on the next scoring pass.

Full methodology in our editorial standards.

COVERAGE [4]

  1. Mastodon — fosstodon.org TIER_1 English(EN) · [email protected] ·

    Microsoft says email spammers are adopting ASCII smuggling https:// arstechnica.com/security/2026/ 09/once-popular-for-attacking-ai-ascii-smuggling-is-embraced-

    Microsoft says email spammers are adopting ASCII smuggling https:// arstechnica.com/security/2026/ 09/once-popular-for-attacking-ai-ascii-smuggling-is-embraced-by-spammers/ # ai # microsoft # security

  2. Mastodon — fosstodon.org TIER_1 English(EN) · [email protected] ·

    Once popular for attacking AI, ASCII smuggling is embraced by spammers A once-overlooked block of unicode that’s invisible to humans is gaining ever wider use.

    Once popular for attacking AI, ASCII smuggling is embraced by spammers A once-overlooked block of unicode that’s invisible to humans is gaining ever wider use. https://s.faithcollapsing.com/yi1iz #ai #ascii-smuggling #biz-&-it #prompt-injections #security #spam-filter-evasion

  3. Mastodon — mastodon.social TIER_1 English(EN) · [email protected] ·

    Once popular for attacking AI, ASCII smuggling is embraced by spammers A once-overlooked block of unicode that’s invisible to humans is gaining ever wider use.

    Once popular for attacking AI, ASCII smuggling is embraced by spammers A once-overlooked block of unicode that’s invisible to humans is gaining ever wider use. # ai # ascii -smuggling # biz -&-it # prompt -injections # security # spam -filter-evasion https:// arstechnica.com/secu…

  4. Mastodon — mastodon.social TIER_1 English(EN) · [email protected] ·

    Once popular for attacking AI, ASCII smuggling is embraced by spammers A once-overlooked block of unicode that’s invisible to humans is gaining ever wider use.

    Once popular for attacking AI, ASCII smuggling is embraced by spammers A once-overlooked block of unicode that’s invisible to humans is gaining ever wider use. https://s.faithcollapsing.com/yi1iz #ai #ascii-smuggling #biz-&-it #prompt-injections #security #spam-filter-evasion