Stay updated on the latest compromise incidents in infosec. Discover how breaches occur and learn strategies to protect your data and networks.
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Background for this topic.
Compromise in information security means unauthorized access or control over a system, network, or data, often resulting from exploiting vulnerabilities like software bugs, weak credentials, or misconfigurations. It indicates that an attacker has bypassed security measures to read, modify, or disrupt resources without permission.
Such compromises pose risks including data theft, unauthorized system manipulation, and persistent attacker presence. Detecting and containing compromises requires monitoring for unusual activity, applying timely patches, and enforcing strong access controls to limit attacker movement and reduce the impact of exploited weaknesses.
Weekly headline count for the current query.
Cisco is warning that a critical Catalyst SD-WAN Controller authentication bypass flaw, tracked as CVE-2026-20182, was actively exploited in zero-day attacks that allowed attackers to gain administrative privileges on compromised devices. [...]
Cisco is warning that a critical authentication bypass vulnerability in Cisco Catalyst SD-WAN, tracked as CVE-2026-20127, was actively exploited in zero-day attacks that allowed remote attackers to compromise controllers and add malicious rogue peers to targeted networks. [...]
Over 77,000 Internet-exposed IP addresses are vulnerable to the critical React2Shell remote code execution flaw (CVE-2025-55182), with researchers now confirming that attackers have already compromised over 30 organizations across multiple sectors. [...]
Microsoft has released emergency SharePoint security updates for two zero-day vulnerabilities tracked as CVE-2025-53770 and CVE-2025-53771 that have compromised services worldwide in "ToolShell" attacks. [...]
A critical zero-day vulnerability in Microsoft SharePoint, tracked as CVE-2025-53770, has been actively exploited since at least July 18th, with no patch available and at least 85 servers already compromised worldwide. [...]
Multiple Fortinet FortiWeb instances recently infected with web shells are believed to have been compromised using public exploits for a recently patched remote code execution (RCE) flaw tracked as CVE-2025-25257. [...]
Suspected state-sponsored hackers have been exploiting a zero-day vulnerability in Palo Alto Networks firewalls tracked as CVE-2024-3400 since March 26, using the compromised devices to breach internal networks, steal data and credentials. [...]
The Kinsing malware operator is actively exploiting the CVE-2023-46604 critical vulnerability in the Apache ActiveMQ open-source message broker to compromise Linux systems. [...]
Cisco has addressed the two vulnerabilities (CVE-2023-20198 and CVE-2023-20273) that hackers exploited to compromise tens of thousands of IOS XE devices over the past week. [...]
Cisco disclosed a new high-severity zero-day (CVE-2023-20273) today, actively exploited to deploy malicious implants on IOS XE devices compromised using the CVE-2023-20198 zero-day unveiled earlier this week. [...]
More than 40,000 Cisco devices running the IOS XE operating system have been compromised after hackers exploited a recently disclosed maximum severity vulnerability tracked as CVE-2023-20198. [...]
A threat actor believed to be tied to the FIN8 hacking group exploits the CVE-2023-3519 remote code execution flaw to compromise unpatched Citrix NetScaler systems in domain-wide attacks. [...]
The North Korean state-backed hacker group tracked as Lazarus has been exploiting a critical vulnerability (CVE-2022-47966) in Zoho's ManageEngine ServiceDesk to compromise an internet backbone infrastructure provider and healthcare organizations. [...]
A threat actor has compromised close to 2,000 thousand Citrix NetScaler servers in a massive campaign exploiting the critical-severity remote code execution tracked as CVE-2023-3519. [...]
Mandiant has released a scanner to check if a Citrix NetScaler Application Delivery Controller (ADC) or NetScaler Gateway Appliance was compromised in widespread attacks exploiting the CVE-2023-3519 vulnerability. [...]