NoiseLetter April 2025

Summary

Whew...April nearly took us out, as you can tell with the late NoiseLetter. Between RSA, NoiseFest, a tidal wave of resurgent vulnerabilities, and showing up to more cities than a band on tour (Denver, Baltimore, Dubai, Manchester...what time zone is it?), we’ve been busy. Catch your breath and catch up, here’s what you missed and where we’re headed next.🤘

A̶n̶d̶r̶e̶w̶ Bob Unfiltered

VP of Data Science + Research, Bob Rudis, creatively gives his thoughts, hot-takes, and whatever else he feels like.

Featured

The Strategic Risk of Resurgent Cyber Vulnerabilities

Attackers from every corner of the internet are exploiting a uniquely dangerous class of cyber flaws: resurgent vulnerabilities.

These aren’t being exploited as zero-days — and spikes in activity rarely make headlines. They’re older flaws that quietly return to relevance as attacker interest reignites. Some were deprioritized years ago. Others were never seen as serious. But today, they’re being opportunistically exploited at scale, often in edge technologies like firewalls, routers, and VPNs — the very internet-facing assets attackers use for initial access and persistence.

Download Today >>

Product Announcements

Introducing GreyNoise Experiments

We’re excited to unveil GreyNoise Experiments — where you can see the latest brainstorms from GreyNoise and our partners. All signed-in users can now explore powerful new dashboards, unique data perspectives, and creative applications of our intelligence.These experiments are dynamic and evolving — some will rotate in and out, while others may be refined and graduate into full-fledged product offerings. Check out the Experiments page to explore the most creative ways we’re unlocking insight from our data.

Go Experiment >>

Make our product team the happiest team in the world by sharing your honest feedback! 
  • We're excited to announce our new gift card campaign on Gartner Peer Insights! Share your honest review of GreyNoise and receive a $25 gift card.
  • Or go big and grab a $50 VISA gift card by sharing your thoughts on G2!
  • BUT WAIT — there’s a slight catch...! To score the goods, your review needs to be posted + approved, and they can be kinda particular, so be sure to check out this quick doc with tips to make sure your work gets posted.Thanks for helping us spread the word and showing us love, we seriously appreciate you.

Where to find us

  • GreyNoise University LIVE (Virtual | May 29) GreyNoise 101, now known as GreyNoise Univeristy LIVE is BACK! We are stoked to bring back this once-a-month webinar.  
  • Resurgent Vulnerabilities Webinar (Webinar | June 6) Join GreyNoise Founder & Chief Architect Andrew Morris and VP of Data Science Bob Rudis as they break down key insights from our latest 2025 report, A Blindspot in Cyber Defense: How Resurgent Vulnerabilities Jeopardize Organizational Security. 

Fresh Content

Recent Tags and Vulnerabilities

GreyNoise Labs released 58 tags during the month of April:

Community

  • Request a New GreyNoise Tag - We've just published a new page to allow our amazing community to submit tag requests to the GreyNoise team. 
  • Try our Free Account - Quickly identify noisy scanners and trending attacks with our free plan.
  • Join our Community Slack and Discord- We share intel, give real time updates, and the occasional Dad joke. 

Meme of the Month

*Have a joke you want included in the next NoiseLetter? Submit Your Joke >>

Not subscribed to our NoiseLetter? Subscribe here.

Whew...April nearly took us out, as you can tell with the late NoiseLetter. Between RSA, NoiseFest, a tidal wave of resurgent vulnerabilities, and showing up to more cities than a band on tour (Denver, Baltimore, Dubai, Manchester...what time zone is it?), we’ve been busy. Catch your breath and catch up, here’s what you missed and where we’re headed next.🤘

A̶n̶d̶r̶e̶w̶ Bob Unfiltered

VP of Data Science + Research, Bob Rudis, creatively gives his thoughts, hot-takes, and whatever else he feels like.

Featured

The Strategic Risk of Resurgent Cyber Vulnerabilities

Attackers from every corner of the internet are exploiting a uniquely dangerous class of cyber flaws: resurgent vulnerabilities.

These aren’t being exploited as zero-days — and spikes in activity rarely make headlines. They’re older flaws that quietly return to relevance as attacker interest reignites. Some were deprioritized years ago. Others were never seen as serious. But today, they’re being opportunistically exploited at scale, often in edge technologies like firewalls, routers, and VPNs — the very internet-facing assets attackers use for initial access and persistence.

Download Today >>

Product Announcements

Introducing GreyNoise Experiments

We’re excited to unveil GreyNoise Experiments — where you can see the latest brainstorms from GreyNoise and our partners. All signed-in users can now explore powerful new dashboards, unique data perspectives, and creative applications of our intelligence.These experiments are dynamic and evolving — some will rotate in and out, while others may be refined and graduate into full-fledged product offerings. Check out the Experiments page to explore the most creative ways we’re unlocking insight from our data.

Go Experiment >>

Make our product team the happiest team in the world by sharing your honest feedback! 
  • We're excited to announce our new gift card campaign on Gartner Peer Insights! Share your honest review of GreyNoise and receive a $25 gift card.
  • Or go big and grab a $50 VISA gift card by sharing your thoughts on G2!
  • BUT WAIT — there’s a slight catch...! To score the goods, your review needs to be posted + approved, and they can be kinda particular, so be sure to check out this quick doc with tips to make sure your work gets posted.Thanks for helping us spread the word and showing us love, we seriously appreciate you.

Where to find us

  • GreyNoise University LIVE (Virtual | May 29) GreyNoise 101, now known as GreyNoise Univeristy LIVE is BACK! We are stoked to bring back this once-a-month webinar.  
  • Resurgent Vulnerabilities Webinar (Webinar | June 6) Join GreyNoise Founder & Chief Architect Andrew Morris and VP of Data Science Bob Rudis as they break down key insights from our latest 2025 report, A Blindspot in Cyber Defense: How Resurgent Vulnerabilities Jeopardize Organizational Security. 

Fresh Content

Recent Tags and Vulnerabilities

GreyNoise Labs released 58 tags during the month of April:

Community

  • Request a New GreyNoise Tag - We've just published a new page to allow our amazing community to submit tag requests to the GreyNoise team. 
  • Try our Free Account - Quickly identify noisy scanners and trending attacks with our free plan.
  • Join our Community Slack and Discord- We share intel, give real time updates, and the occasional Dad joke. 

Meme of the Month

*Have a joke you want included in the next NoiseLetter? Submit Your Joke >>

Not subscribed to our NoiseLetter? Subscribe here.

Read the transcript