Vulnerabilities are flaws attackers can exploit to access systems or data; timely patching, isolation, and least privilege reduce the impact.
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Background for this topic.
A vulnerability is a weakness in a system’s design, code, configuration, or operating process that could allow an attacker to violate a security requirement. It may affect software, hardware, networks, cloud services, or exposed interfaces, and is not automatically exploitable: practical risk depends on factors such as exposure, required privileges, available attack paths, and existing controls. Outcomes can include unauthorized access, information disclosure, code execution, or disruption of service.
Effective vulnerability management combines accurate asset inventory with code review, security testing, scanning, and trusted vulnerability intelligence. Organizations should prioritize weaknesses affecting reachable, business-critical systems—especially when exploitation is known or requires little access—then patch or otherwise mitigate them and verify the fix. Where patching is delayed, controls such as disabling an exposed feature, restricting network access, or strengthening authentication can reduce the attack surface. Records should preserve affected versions, risk decisions, remediation owners, and validation results.
Attackers have been exploiting a zero-day vulnerability in Adobe Reader using maliciously crafted PDF documents since at least December. [...]
CISA has given U.S. government agencies four days to secure their systems against a critical-severity vulnerability in Ivanti Endpoint Manager Mobile (EPMM) that has been exploited in attacks since January. [...]
Security researchers discovered a remote code execution (RCE) vulnerability in Apache ActiveMQ Classic that has gone undetected for 13 years and could be exploited to execute arbitrary commands. [...]
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. [...]
Hackers are exploiting a maximum-severity vulnerability, tracked as CVE-2025-59528, in the open-source platform Flowise for building custom LLM apps and agentic systems to execute arbitrary code. [...]
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) ordered federal agencies to secure FortiClient Enterprise Management Server (EMS) instances against an actively exploited vulnerability by Friday. [...]
Fortinet has released an emergency weekend security update for a new critical FortiClient Enterprise Management Server (EMS) vulnerability that is actively exploited in attacks. [...]
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. [...]