Network \u2018background noise\u2019 may predict the next big edge-device vulnerability | CyberScoop<\/title> <meta name=\"description\" content=\"GreyNoise researchers spotted a consistent trend in forthcoming vulnerabilities affecting security tools, providing defenders an early-warning system for likely imminent attacks.\"> <link rel=\"canonical\" href=\"https:\/\/cyberscoop.com\/greynoise-traffic-surge-early-warning-system-network-edge-device-vulnerabilities\/\"> <meta property=\"og:locale\" content=\"en_US\"> <meta property=\"og:type\" content=\"article\"> <meta property=\"og:title\" content=\"Network \u2018background noise\u2019 may predict the next big edge-device vulnerability\"> <meta property=\"og:description\" content=\"GreyNoise researchers spotted a consistent trend in forthcoming vulnerabilities affecting security tools, providing defenders an early-warning system for likely imminent attacks.\"> <meta property=\"og:url\" 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class=\"single-article__header \" readability=\"26.015021459227\">\n<div class=\"single-article__header-content\" readability=\"35.605321507761\">\n<p> GreyNoise researchers spotted a consistent trend in forthcoming vulnerabilities affecting security tools, providing defenders an early-warning system for likely imminent attacks. <\/p>\n<p>  <br \/>\n<audio id=\"audio-player\" src=\"https:\/\/wp-tts-cdn.api.scpnewsgrp.com\/cyberscoop\/88657\/english.openai.mp3\"><\/audio> <\/p>\n<div readability=\"11\">\n<div>\n<p>Listen to this article<\/p>\n<p>  <\/p>\n<p>0:00<\/p>\n<\/p><\/div>\n<p>  <\/p>\n<p> <span id=\"tts-tooltip\">Learn more.<\/span> <span> This feature uses an automated voice, which may result in occasional errors in pronunciation, tone, or sentiment. <\/span> <\/p>\n<\/div>\n<p>  <\/div>\n<div class=\"single-article__cover-wrap\">\n<figure class=\"single-article__cover\"> <img data-recalc-dims=\"1\" fetchpriority=\"high\" width=\"640\" height=\"305\" 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class=\"single-article__content-inner has-drop-cap\"> <html readability=\"48.957915831663\"><body readability=\"103.54585837471\"><\/p>\n<p>Attackers rarely exploit an edge-device vulnerability indiscriminately. Typically, they first test how widely the flaw can be used and how much access it can provide, then move on to steal data or disrupt operations.<\/p>\n<p>Pre-attack surveillance and planning leaves a lot of noise in its wake. These signals \u2014 particularly spikes in traffic that are hitting specific vendors \u2014 can act as an early-warning system, often preceding public vulnerability disclosures, according to research GreyNoise shared exclusively with CyberScoop prior to its release. <\/p>\n<p>Roughly half of every activity surge GreyNoise detected during a 103-day study last winter was followed by a vulnerability disclosure from the same targeted vendor within three weeks, GreyNoise said in its <a href=\"https:\/\/www.greynoise.io\/resources\/ten-days-before-zero\">report<\/a>.<\/p>\n<p>Researchers determined that the median warning of an impending vulnerability disclosure arrived nine days before the targeted vendor issued a public alert to its customers.<\/p>\n<div class=\"ad ad--inline_1 \">\n<div class=\"ad__inner\"> <span class=\"screen-reader-text\">Advertisement<\/span> <\/div>\n<\/div>\n<p>\u201cVirtually every time we see large scale spikes in reconnaissance and inventory activity looking for a certain device, it\u2019s because somebody knows about a vulnerability,\u201d Andrew Morris, founder and chief architect at GreyNoise, told CyberScoop.<\/p>\n<p>\u201cWithin a few days or weeks \u2014 usually within the responsible disclosure timeline \u2014 a new very bad vulnerability comes out,\u201d he added.<\/p>\n<p>GreyNoise insists that every day of advance notice matters, giving defenders an opportunity to defend against and thwart potential attacks before they occur. <\/p>\n<p>The real-time network edge scanning platform spotted 104 distinct activity surges across 18 vendors during its study period. These embedded systems, including routers, VPNs, firewalls and other security systems, consistently account for the <a href=\"https:\/\/cyberscoop.com\/mandiant-m-trends-2025\/\">most commonly exploited vulnerabilities<\/a>.<\/p>\n<p>\u201cAttackers love hacking security devices like security appliances. The irony of that is just not lost on me at all,\u201d Morris said.<\/p>\n<div class=\"ad ad--inline_1 \">\n<div class=\"ad__inner\"> <span class=\"screen-reader-text\">Advertisement<\/span> <\/div>\n<\/div>\n<p>\u201cIt hasn\u2019t gotten bad enough for us to start taking the security of these devices seriously,\u201d he added. \u201cIt\u2019s not bad enough for us to take it seriously enough to start ripping these things out and replacing them with new devices or new vendors.\u201d<\/p>\n<p>GreyNoise linked traffic surges to a swarm of vulnerabilities disclosed by vendors across the market, including Cisco, Palo Alto Networks, Fortinet, Ivanti, HPE, MicroTik, TP-Link, VMware, Juniper, F5, Netgear and others.<\/p>\n<p>\u201cIt\u2019s becoming scientifically empirical, and it\u2019s becoming more like meteorology than mysticism,\u201d Morris said. \u201cThis is like clockwork now.\u201d<\/p>\n<p>GreyNoise breaks these traffic surges down to measure intensity and breadth. Session counts indicate how hard existing sources are hammering a specific vendor and unique source IP counts demonstrate how widely new infrastructure is joining the activity, researchers wrote in the report.<\/p>\n<p>\u201cWhen both the intensity and breadth of targeting increase simultaneously, it signals a coordinated escalation,\u201d the report said. <\/p>\n<div class=\"ad ad--inline_1 \">\n<div class=\"ad__inner\"> <span class=\"screen-reader-text\">Advertisement<\/span> <\/div>\n<\/div>\n<p>\u201cWhen you see a session spike against one of your vendors and new source IPs joining at the same time, treat it as a high-confidence reason to look harder. When you see only an IP spike, do not assume a vulnerability is coming,\u201d researchers added. <\/p>\n<p>The study bolsters other research from Verizon, Google Threat Intelligence Group and <a href=\"https:\/\/cyberscoop.com\/social-engineering-surge-intrusion-vector-mandiant-m-trends\/\">Mandiant<\/a> \u2014 landing during what GreyNoise calls \u201cthe most aggressive period of edge device exploitation on record.\u201d<\/p>\n<p>This activity doesn\u2019t happen in a vacuum and threat groups aren\u2019t flooding edge devices with traffic for free or for fun, according to Morris.<\/p>\n<p>\u201cPeople tend to treat internet background noise like it\u2019s this unexplainable phenomenon,\u201d he said. \u201cThey\u2019re clearly trying to test the existence of a vulnerability in order to compromise the systems.\u201d<\/p>\n<p><\/body> <\/p>\n<footer class=\"single-article__footer\" readability=\"2.8031674208145\">\n<div class=\"author-card\" readability=\"14\">\n<div class=\"author-card__avatar\">\n<figure class=\"author-card__image-wrap\"> <img data-recalc-dims=\"1\" decoding=\"async\" class=\"author-card__image\" src=\"https:\/\/i0.wp.com\/ddi.mohflo.net\/wp-content\/uploads\/2026\/04\/network-background-noise-may-predict-the-next-big-edge-device-vulnerability-1.jpg?w=640&ssl=1\" alt=\"Matt Kapko\"> <\/figure>\n<\/p><\/div>\n<p><h4 class=\"author-card__name\">Written by Matt Kapko<\/h4>\n<p> Matt Kapko is a reporter at CyberScoop. His beat includes cybercrime, ransomware, software defects and vulnerability (mis)management. The lifelong Californian started his journalism career in 2001 with previous stops at Cybersecurity Dive, CIO, SDxCentral and RCR Wireless News. 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{"id":8545,"date":"2026-04-20T05:00:00","date_gmt":"2026-04-20T10:00:00","guid":{"rendered":"https:\/\/cyberscoop.com\/?p=88657"},"modified":"2026-04-20T05:00:00","modified_gmt":"2026-04-20T10:00:00","slug":"network-background-noise-may-predict-the-next-big-edge-device-vulnerability","status":"publish","type":"post","link":"https:\/\/ddi.mohflo.net\/index.php\/2026\/04\/20\/network-background-noise-may-predict-the-next-big-edge-device-vulnerability\/","title":{"rendered":"Network \u2018background noise\u2019 may predict the next big edge-device vulnerability"},"content":{"rendered":"