Security warnings identify potential threats, unsafe configurations, or urgent weaknesses so organizations can assess risk and take protective action.
Search across headline titles and summaries.
Background for this topic.
Warning is a notification that a security-relevant condition may require attention, such as a newly disclosed vulnerability, suspicious authentication activity, malicious campaign, unsafe configuration, or deceptive message. In security news, the term commonly covers public advisories and threat-intelligence notices as well as operational alerts generated by defensive systems; it does not by itself prove that an attack or compromise has occurred.
Practitioners should assess the warning’s source, affected products or environments, evidence, severity, exploitability, and recommended action. Vulnerability warnings may require identifying exposed assets, applying a fix or mitigation, and checking for exploitation; campaign warnings may provide indicators for detection and investigation. Alerts should be triaged against logs and other evidence, with significant findings routed into incident response. Because attackers can imitate urgent security notices, recipients should verify requests and access instructions through trusted channels, while excessive or poorly tuned alerts can create fatigue and obscure genuinely important signals.
ReliaQuest warns that initial access vulnerability exploitation is driving successful ransomware attacks
Two flaws in TeleMessage are 'frequent attack vectors for malicious cyber actors' The US security watchdog CISA has warned that malicious actors are actively exploiting two flaws in the Signal clone TeleMessage TM SGNL, and has directed federal agencies to patch the flaws or discontinue use of the app by July 22.…
Google’s Mandiant Warns About Remote Attacks Disrupting Grid StabilityVulnerabilities in networked devices programmed to instantaneously trip power grid substation circuit breakers could be the means hackers use to cause the next blackout, warn researchers. There are "systemic patterns across substations, utilities and industrial sites worldwide," Mandiant warned.
Cisco has removed a backdoor account from its Unified Communications Manager (Unified CM), which would have allowed remote attackers to log in to unpatched devices with root privileges. [...]
Citrix warns that patching recently disclosed vulnerabilities that can be exploited to bypass authentication and launch denial-of-service attacks may also break login pages on NetScaler ADC and Gateway appliances. [...]
Microsoft warns thousands of North Korean workers have infiltrated tech, manufacturing, and transportation sectors to steal money and data.
'Heightened Threat Environment' Faces Critical Infrastructure, US Government WarnsMany types of commonly used types of industrial control systems continue to be deployed in a manner that leaves them publicly exposed to the internet, often by U.S.-based critical infrastructure operators, in what amounts to a preventable security risk, researchers warn.
Interpol warns that scam centers are expanding beyond Southeast Asia
U.S. cyber agencies, the FBI, and NSA issued an urgent warning today about potential cyberattacks from Iranian-affiliated hackers targeting U.S. critical infrastructure. [...]
Time ticking for defenders as social engineering pros weave wider web Just a few weeks after warning about Scattered Spider's tactics shifting toward the insurance industry, the same experts now say the aviation industry is now on the ransomware crew's radar.…
U.S. cybersecurity and intelligence agencies have issued a joint advisory warning of potential cyber-attacks from Iranian state-sponsored or affiliated threat actors. "Over the past several months, there has been increasing activity from hacktivists and Iranian government-affiliated actors, which is expected to escalate due to recent events," the agencies said
US Defense Industrial Base (DIB) companies are “at increased risk” of cyber-attacks from Iran-aligned hacking groups
Microsoft has confirmed a new known issue causing delivery delays for June 2025 Windows security updates due to an incorrect metadata timestamp. [...]
The FBI alert comes amid several reported cyber incidents impacting North America-based airlines, including Hawaiian Airlines
Glasgow City Council is alerting residents to a parking scam which could be linked to a recent cyber-incident