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<blockquote style="position: relative; padding-left: 55px;"><section><a href="https://infosec.exchange/users/greynoise/statuses/116048274219221618">GreyNoise (greynoise@infosec.exchange)'s status on Wednesday, 11-Feb-2026 08:28:18 JST</a><a href="https://infosec.exchange/@greynoise" title="greynoise@infosec.exchange"><img src="https://gnusocial.jp/avatar/239158-48-20240209210313.webp" width="48" height="48" alt="GreyNoise" style="position: absolute; left: 0; top: 0;">GreyNoise</a></section><article><p>We observed a 65% drop in global telnet traffic in a single hour on Jan 14, settling into a sustained 59% reduction. 18 ASNs went silent, 5 countries disappeared, but cloud providers were unaffected.</p><p>Our analysis of 51.2M sessions points to backbone-level port 23 filtering by a North American Tier 1 transit provider.</p><p>🔗 <a href="https://www.labs.greynoise.io/grimoire/2026-02-10-telnet-falls-silent/" rel="nofollow">https://www.labs.greynoise.io/grimoire/2026-02-10-telnet-falls-silent/</a></p><p><a href="https://infosec.exchange/tags/GreyNoise" rel="tag">#GreyNoise</a> <a href="https://infosec.exchange/tags/ThreatIntel" rel="tag">#ThreatIntel</a> <a href="https://infosec.exchange/tags/CyberSecurity" rel="tag">#CyberSecurity</a> <a href="https://infosec.exchange/tags/InfoSec" rel="tag">#InfoSec</a></p></article><footer><a rel="bookmark" href="https://gnusocial.jp/conversation/6143165#notice-12099114">In conversation</a><time datetime="2026-02-11T08:28:18+09:00" title="Wednesday, 11-Feb-2026 08:28:18 JST">about 10 days ago</time> <span>from <span><a href="https://infosec.exchange/@greynoise/116048274219221618" rel="external" title="Sent from infosec.exchange via ActivityPub">infosec.exchange</a></span></span><a href="https://infosec.exchange/@greynoise/116048274219221618">permalink</a><h4>Attachments</h4><ol><li><article><header><div>Domain not in remote thumbnail source whitelist: www.labs.greynoise.io</div><h5><a href="https://www.labs.greynoise.io/grimoire/2026-02-10-telnet-falls-silent/#GreyNoise">2026-01-14: The Day the telnet Died – GreyNoise Labs</a></h5><div> from <span>hrbrmstr &amp; 🔮Orbie✨</span></div></header><div>On January 14, 2026, global telnet traffic observed by GreyNoise sensors fell off a cliff. A 59% sustained reduction, eighteen ASNs going completely silent, five countries vanishing from our data entirely. Six days later, CVE-2026-24061 dropped. Coincidence is one explanation.</div><footer></footer></article></li></ol></footer></blockquote>

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GreyNoise (greynoise@infosec.exchange)'s status on Wednesday, 11-Feb-2026 08:28:18 JST GreyNoise
We observed a 65% drop in global telnet traffic in a single hour on Jan 14, settling into a sustained 59% reduction. 18 ASNs went silent, 5 countries disappeared, but cloud providers were unaffected.
Our analysis of 51.2M sessions points to backbone-level port 23 filtering by a North American Tier 1 transit provider.
🔗 https://www.labs.greynoise.io/grimoire/2026-02-10-telnet-falls-silent/
#GreyNoise #ThreatIntel #CyberSecurity #InfoSec
In conversationabout 10 days ago from infosec.exchangepermalink
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  2026-01-14: The Day the telnet Died – GreyNoise Labs
  from hrbrmstr & 🔮Orbie✨
  On January 14, 2026, global telnet traffic observed by GreyNoise sensors fell off a cliff. A 59% sustained reduction, eighteen ASNs going completely silent, five countries vanishing from our data entirely. Six days later, CVE-2026-24061 dropped. Coincidence is one explanation.

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