Attacks

CISA is aware of public reporting regarding potential unauthorized access to a legacy Oracle cloud environment. While the scope and impact remains unconfirmed, the nature of the reported activity presents potential risk to organizations and individuals, particularly where credential material may be exposed, reused across separate, unaffiliated systems, or embedded (i.e., hardcoded into scripts, applications, infrastructure templates, or automation tools). When credential material is embedded, it is difficult to discover and can enable long-term unauthorized…

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Fortinet is aware of a threat actor creating a malicious file from previously exploited Fortinet vulnerabilities (CVE-2024-21762, CVE-2023-27997, and CVE-2022-42475) within FortiGate products. This malicious file could enable read-only access to files on the device’s file system, which may include configurations. Fortinet has communicated directly with the account holders of customers identified as impacted by this issue based on the available telemetry with mitigation guidance. See the following resource for more information: Analysis of Threat…

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Ivanti released security updates to address vulnerabilities (CVE-2025-22457) in Ivanti Connect Secure, Policy Secure & ZTA Gateways. A cyber threat actor could exploit CVE-2025-22457 to take control of an affected system. CISA has added CVE-2025-22457 to its Known Exploited Vulnerabilities Catalog. See the following resources for more guidance: April Security Update | Ivanti April Security Advisory Ivanti Connect Secure, Policy Secure & ZTA Gateways (CVE-2025-22457) Suspected China-Nexus Threat Actor Actively Exploiting Critical Ivanti Connect Secure Vulnerability (CVE-2025-22457)…

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Today, CISA—in partnership with the National Security Agency (NSA), Federal Bureau of Investigation (FBI), Australian Signals Directorate’s Australian Cyber Security Centre (ASD’s ACSC), Canadian Centre for Cyber Security (CCCS), and New Zealand’s National Cyber Security Centre (NCSC-NZ)—released joint Cybersecurity Advisory Fast Flux: A National Security Threat (PDF, 841 KB). This advisory warns organizations, internet service providers (ISPs), and cybersecurity service providers of the ongoing threat of fast flux enabled malicious activities and provides guidance on…

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CISA has published a Malware Analysis Report (MAR) with analysis and associated detection signatures on a new malware variant CISA has identified as RESURGE. RESURGE contains capabilities of the SPAWNCHIMERA[1] malware variant, including surviving reboots; however, RESURGE contains distinctive commands that alter its behavior. These commands:  Create a web shell, manipulate integrity checks, and modify files.  Enable the use of web shells for credential harvesting, account creation, password resets, and escalating permissions.  Copy the web…

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A popular third-party GitHub Action, tj-actions/changed-files (tracked as CVE-2025-30066), was compromised. This GitHub Action is designed to detect which files have changed in a pull request or commit. The supply chain compromise allows for information disclosure of secrets including, but not limited to, valid access keys, GitHub Personal Access Tokens (PATs), npm tokens, and private RSA keys. This has been patched in v46.0.1.  CISA added CVE-2025-30066 to its Known Exploited Vulnerabilities Catalog.  CISA strongly urges…

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CISA released thirteen Industrial Control Systems (ICS) advisories on March 13, 2025. These advisories provide timely information about current security issues, vulnerabilities, and exploits surrounding ICS. ICSA-25-072-01 Siemens Teamcenter Visualization and Tecnomatrix Plant Simulation ICSA-25-072-02 Siemens SINEMA Remote Connect Server ICSA-25-072-03 Siemens SIMATIC S7-1500 TM MFP ICSA-25-072-04 Siemens SiPass integrated AC5102/ACC-G2 and ACC-AP ICSA-25-072-05 Siemens SINAMICS S200 ICSA-25-072-06 Siemens SCALANCE LPE9403 ICSA-25-072-07 Siemens SCALANCE M-800 and SC-600 Families ICSA-25-072-08 Siemens Tecnomatix Plant Simulation ICSA-25-072-09 Siemens…

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Today, CISA—in partnership with the Federal Bureau of Investigation (FBI) and Multi-State Information Sharing and Analysis Center (MS-ISAC)—released joint Cybersecurity Advisory, #StopRansomware: Medusa Ransomware. This advisory provides tactics, techniques, and procedures (TTPs), indicators of compromise (IOCs), and detection methods associated with known Medusa ransomware activity. Medusa is a ransomware-as-a-service variant used to conduct ransomware attacks; as of December 2024, over 300 victims from critical infrastructure sectors have been impacted. Medusa actors use common techniques like phishing…

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The Federal Bureau of Investigation (FBI) Internet Crime Complaint Center (IC3) has released an alert warning of a scam involving criminal actors masquerading as the “BianLian Group.” The cyber criminals target corporate executives by sending extortion letters threatening to release victims’ sensitive information unless payment is received.  CISA encourages organizations to review the following FBI Public Service Announcement for more information: Mail Scam Targeting Corporate Executives Claims Ties to Ransomware Organizations should report incidents and anomalous activity…

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Today, CISA—in partnership with the Federal Bureau of Investigation (FBI) and Multi-State Information Sharing and Analysis Center (MS-ISAC)—released a joint Cybersecurity Advisory, #StopRansomware: Ghost (Cring) Ransomware. This advisory provides network defenders with indicators of compromise (IOCs), tactics, techniques, and procedures (TTPs), and detection methods associated with Ghost ransomware activity identified through FBI investigations. Ghost actors conduct these widespread attacks targeting and compromising organizations with outdated versions of software and firmware on their internet facing services.…

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