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Background for this topic.
An exploit is code, data, or a sequence of actions that uses a software, hardware, or configuration vulnerability to produce unintended behavior. Depending on the flaw and the attacker’s access, it may enable unauthorized code execution, privilege escalation, information disclosure, or denial of service. Exploitation can occur remotely through exposed services, web applications, or client software, or locally after an attacker gains limited access.
Exploitation matters because a vulnerability becomes an active attack path when the required conditions are reachable and exploitable. Defenders should inventory affected assets, prioritize remediation when exploitation is known or credible, apply patches or vendor mitigations, and reduce exposure through access controls, segmentation, and secure configuration. Monitoring for exploit-specific indicators—such as abnormal requests, unexpected processes, or privilege changes—supports detection; systems suspected of successful exploitation require containment and investigation for follow-on access.
Its Mythos Preview model, which can allegedly find and exploit critical zero-days, also comes with certain controls, the vendor said.
Under the alias 'Chaotic Eclipse,' a researcher released a PoC exploit for a zero-day flaw that allows for system takeover by a local user, citing an undisclosed beef with Microsoft.
Start Here: Strong Monitoring, Behavior-Based Controls, Virtual PatchingThanks to Anthropic's Mythos presaging a world in which zero-day exploits are common, one cybersecurity expert says the new mantra is this: "assume you are unpatched." Vendors and customers must focus more than ever on strong monitoring, behavior-based controls and virtual patching.
Asymmetry Between Exploits Wielded by Nation-States and Hackers Will DisappearAnthropic's announcement that its Mythos Preview large language model can find serious zero-day flaws across all manner of code bases old and new, and quickly chain vulnerabilities together to build working exploits, promises to democratize access to such capabilities.
Threat actors have been exploiting a previously unknown zero-day vulnerability in Adobe Reader using maliciously crafted PDF documents since at least December 2025
But Expect Plenty of Bottlenecks in Coordination, Validation and Patch DeploymentAnthropic's Claude Mythos Preview shows how AI can discover and chain vulnerabilities at scale, but the bigger challenge for defenders is redesigning disclosure, triage and patching processes so fixes can be deployed safely before attackers exploit the gap.
Okta's Brett Winterford on Identity Threats and Agentic AI RisksAI is accelerating cyberattacks, collapsing timelines and exposing new identity risks. Okta's Brett Winterford explains how attackers are using AI to scale phishing, exploit credentials and infiltrate enterprises - and what CIOs must do to defend against this rapidly evolving threat landscape.
A critical vulnerability in the Ninja Forms File Uploads premium add-on for WordPress allows uploading arbitrary files without authentication, which can lead to remote code execution. [...]
The Russia-linked threat actor known as APT28 (aka Forest Blizzard) has been linked to a new campaign that has compromised insecure MikroTik and TP-Link routers and modified their settings to turn them into malicious infrastructure under their control as part of a cyber espionage campaign since at least May 2025
In the rapid evolution of the 2026 threat landscape, a frustrating paradox has emerged for CISOs and security leaders: Identity programs are maturing, yet the risk is actually increasing
GrafanaGhost chains AI prompt injection and URL flaws to exfiltrate sensitive Grafana data
Microsoft has released a new report about the Storm-1175 group and its connection to Medusa ransomware
A China-based threat actor known for deploying Medusa ransomware has been linked to the weaponization of a combination of zero-day and N-day vulnerabilities to orchestrate "high-velocity" attacks and break into susceptible internet-facing systems
Exploit code has been released for an unpatched Windows privilege escalation flaw reported privately to Microsoft, allowing attackers to gain SYSTEM or elevated administrator permissions. [...]
Microsoft says that Storm-1175, a China-based financially motivated cybercriminal group known for deploying Medusa ransomware payloads, has been deploying n-day and zero-day exploits in high-velocity attacks. [...]
An emerging threat cluster tracked as UAT-10608 is exploiting vulnerable Web-exposed Next.js apps and using an automated tool to exfiltrate credentials, secrets, and other system data.
This week had real hits. The key software got tampered with. Active bugs showed up in the tools people use every day. Some attacks didn’t even need much effort because the path was already there
Hackers are running a large-scale campaign to steal credentials in an automated way after exploiting React2Shell (CVE-2025-55182) in vulnerable Next.js apps. [...]