Grey Noise

Attackers are automating exploitation at scale, targeting both new and old vulnerabilities — some before appearing in KEV. Our latest report breaks down which CVEs were exploited most in 2024, how ransomware groups are leveraging mass exploitation, and why real-time intelligence is critical.

Ransomware group Black Basta’s chat logs were leaked, revealing 62 mentioned CVEs (Source: VulnCheck). GreyNoise identified 23 of these CVEs as actively exploited, with some targeted in the last 24 hours. Notably, CVE-2023-6875 is being exploited despite not appearing in CISA’s KEV catalog — reinforcing the need for real-time intelligence beyond static lists.

GreyNoise has observed exploitation attempts targeting two Cisco vulnerabilities, CVE-2023-20198 and CVE-2018-0171. CVE-2023-20198 is being actively exploited by over 110 malicious IPs, primarily from Bulgaria, Brazil, and Singapore, while CVE-2018-0171 has seen exploitation attempts from two malicious IPs traced to Switzerland and the United States. These CVEs were referenced in recent reports on Salt Typhoon, a Chinese state-sponsored threat group, though GreyNoise is not attributing the observed exploitation to Salt Typhoon.

GreyNoise has observed active exploitation attempts targeting a newly disclosed authentication bypass vulnerability, CVE-2025-0108, affecting Palo Alto Networks PAN-OS. This high-severity flaw allows unauthenticated attackers to execute specific PHP scripts, potentially leading to unauthorized access to vulnerable systems.

GreyNoise has detected a surge in exploitation attempts for two vulnerabilities—one flagged as a top target by government agencies and another flying under the radar despite real-world attacks. See the latest exploitation trends and why real-time intelligence is essential for risk management.

This blog details how attackers are actively exploiting Fortinet FortiGate firewalls vulnerable to CVE-2022-40684, with real-time insights from GreyNoise to help defenders understand and respond to these threats.

CVE-2024-40891: Zyxel CPE Zero-day Exploitation. Hackers are actively exploiting a telnet-based command injection vulnerability in Zyxel CPE devices, impacting 1,500+ exposed systems. No patch is available yet.

Discover whether your team truly needs a threat intelligence feed with our unbiased white paper. This practical guide helps cybersecurity professionals assess their needs, identify gaps, and confidently evaluate options for a tailored, effective cyber defense strategy.

A comprehensive analysis of benign internet scanning activity from November 2024, examining how quickly and thoroughly various legitimate scanning services (like Shodan, Censys, and others) discover and probe new internet-facing assets. The study deployed 24 new sensors across 8 geographies and 5 autonomous systems, revealing that most scanners found new nodes within 5 minutes, with ONYPHE leading in first contacts.

Attackers exploit vulnerabilities within hours of PoC releases. Learn how GreyNoise provides real-time intelligence to detect and disrupt threats, helping defenders respond faster and stay ahead of evolving risks.

Discover why over 220 cybersecurity professionals ranked effective communication as the most undervalued skill in the industry. A Storm⚡️Watch podcast poll revealed the critical role "soft skills" play in bridging technical complexity with business needs. Explore real-world stories from industry experts who honed their communication abilities, from simplifying incident reports for executives to adapting technical messages for diverse audiences. Learn how emotional intelligence, adaptability, and clarity drive collaboration and success in cybersecurity. Dive into the full discussion for actionable insights on mastering this essential skill.

A new Censys report found 145,000 exposed ICSs and thousands of insecure human-machine interfaces (HMIs), providing attackers with an accessible path to disrupt critical operations. Real-world examples underscore the danger, with Iranian and Russian-backed hackers exploiting HMIs to manipulate water systems in Pennsylvania and Texas. GreyNoise research further highlights the urgency: attackers are actively scanning for HMIs and prioritizing Remote Access Services (RAS) over complex ICS protocols, making these easily accessible entry points prime targets for exploitation.

Discover insights from a multi-year APT campaign that exploited network perimeter vulnerabilities to target high-value entities, revealing critical gaps in edge device security. GreyNoise shares strategic intelligence and actionable steps for defending against these sophisticated threats, empowering security teams to strengthen their perimeter defenses against ongoing exploitation.

GreyNoise has discovered previously undisclosed zero-day vulnerabilities in IoT-connected live streaming cameras, leveraging AI to catch an attack before it could escalate. This marks one of the first instances where threat detection has been augmented by AI to discover zero-day vulnerabilities.

Joint U.S. and UK advisory identifies 24 vulnerabilities exploited by Russian state-sponsored APT 29, with GreyNoise detecting active probing on nine of these critical CVEs. Stay informed with real-time intelligence to prioritize patching and strengthen your organization's defenses against opportunistic cyber threats.

Deepfakes and disinformation campaigns are reshaping the election cybersecurity landscape, threatening the integrity of democratic processes. This final part of our series explores how AI-driven tools spread false narratives, erode trust, and increase polarization, while outlining the urgent need for public awareness, media literacy, and collaborative defense strategies to safeguard democracy in the digital age.

Discover how GreyNoise’s honeypots are monitoring exploit attempts on the SolarWinds Serv-U vulnerability (CVE-2024-28995). Gain insights into the specific files attackers target and how real-time data helps security teams focus on true threats. Read our full blog for detailed analysis.

Discover how phishing and social engineering threaten the 2024 U.S. elections in part three of our 'Election Cybersecurity' series. Learn how attackers exploit human vulnerabilities to compromise systems and how to defend against these evolving threats.

Discover the latest findings from Censys and GreyNoise on the real-world threats facing internet-exposed Industrial Control Systems (ICS). At LABSCon 2024, they revealed surprising research on how attackers prioritize common Remote Access Service (RAS) protocols over ICS-specific communication, highlighting key security challenges for critical infrastructure. Learn more about how internet-connected HMIs are rapidly targeted and the implications for ICS security.

GreyNoise reveals mysterious Noise Storms, spoofed traffic events linked to covert communications and China. Learn how these disruptions impact global networks and what security leaders can do to stay prepared.