company
GreyNoise is a cybersecurity firm that monitors internet-wide scanning and attack traffic, providing threat intelligence on mass exploitation activity.
No evidence-backed relationships are recorded.
LevelBlue says attackers are exploiting NetScaler flaw CVE-2026-88771, rated 9.5, to create a hidden superuser account and plant web shells. The patch closes the injection but removes neither, so already-exposed appliances need a compromise check.
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Mandiant and Google traced a September 2026 campaign exploiting NetScaler bug CVE-2026-88772, CVSS 9.5, to root on appliances with no login. From there the intruders drop web shells and a Python tunneler that reaches into victims' internal networks to steal credentials.
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TASK#STOMP, a Windows backdoor researchers dissected, uploads a victim's business documents and then stays to copy each new or edited one. Loss from a single infection keeps growing until someone finds and removes it.
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CVE-2026-21962 reached CISA's exploited-vulnerabilities catalog on August 24 with an August 27 deadline. Honeypots logged attempts in March, and Oracle's fix has been available since January.
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GreyNoise and Blackpoint Cyber trace the new PaperCut auth-bypass chain to one scanning address running AI agents against schools, which turns an unpatched print server from a maintenance ticket into a credential incident.
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PaperCut NG/MF 26.0.5, 25.0.13 and 24.1.10 carry every fix from three emergency patch rounds plus two regression fixes, while GreyNoise and Blackpoint Cyber count at least 395 organizations already breached.
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GreyNoise reports the WordPress intrusion and the Zyxel switch harvest as separate operations run from shared scanning infrastructure by a suspected Chinese-speaking actor it tracks as Kapibala.
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GreyNoise traced scans from a single IP address, running since early June 2026, to a Chinese-speaking actor that breached 49 organizations through WordPress Core and stripped configs and root hashes from 996 ZyXEL switches.
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A site logged twenty requests for its unreachable /.env file from a client naming itself ClaudeBot. GreyNoise counted 824 addresses scanning under forged AI crawler names, and saw no request for robots.txt in the whole campaign.
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Two unauthenticated Check Point RCEs, a CVSS 10.0 GitLab path traversal and an already-exploited N-able flaw all came due on September 11. How fast each one closes depends on the release you happen to be running.
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GreyNoise's January tally of React2Shell traffic shows payload text mutating freely while the client tooling behind it stays nearly fixed. That decides what a perimeter rule should match on.
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GreyNoise says a likely Russian-speaking actor built and tested PaperCut exploits in a lab, then ran hundreds of agents on a Codex harness with a DeepSeek model against 440 servers in 48 countries. The sending infrastructure was already on its watchlist.
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Wiz says a TeamCity honeypot exposing JDWP was mining Monero within hours, and GreyNoise counted more than 6,000 unique IPs scanning for the protocol in 90 days.
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