Security bulletins

Warnings and recommendations from national cyber security agencies, newest first. Each brief is at most 120 words, bottom line first, and links to the publication it was written from.

CISA · Advisory ·

#StopRansomware: SafePay Ransomware

CISA warns of SafePay ransomware targeting businesses and infrastructure.

SafePay actors gain access by stealing passwords, exploiting vulnerabilities, and using phishing. They use CVE-2020-3259, CVE-2023-20269, CVE-2023-27532, CVE-2024-40711, and CVE-2024-40766. SafePay actors encrypt files and demand payment.

Recommended by the publisher: CISA recommends patching systems, implementing Zero Trust, and restricting administrative tools.

Read the original at www.cisa.gov · Machine-written brief

CISA · Advisory ·

Chinese Government-linked Cyber Threat Actors Combine Automated and Hands-on Hacking Tools to Steal Sensitive Data

Chinese government-linked actors target organizations worldwide.

Chinese government-linked cyber threat actors exploit vulnerabilities in Microsoft Exchange servers using scanning tools and cross-site scripting attacks. They establish persistence through VPN software and exfiltrate emails and credentials using scripts. Affected products include those with CVE-2014-6278, CVE-2015-3306, and other vulnerabilities.

Recommended by the publisher: CISA recommends disabling unused services and ports, sanitizing web application inputs, and implementing multifactor authentication.

Read the original at www.cisa.gov · Machine-written brief

CISA · Advisory ·

China-Based Artificial Intelligence Companies Conducting Industrial-Scale Distillation Campaigns Against U.S. AI Companies

China-based AI companies conduct industrial-scale distillation campaigns against U.S. AI companies.

China-based AI companies, including DeepSeek and Alibaba, extracted billions of tokens from U.S. frontier AI models, violating terms of use. They use multiple pathways and proxies to gain unauthorized access. CISA assesses these activities threaten U.S. technological leadership.

Recommended by the publisher: CISA recommends U.S. AI companies implement detection and mitigation, deploy targeted response changes, and establish cross-organization intelligence sharing.

Read the original at www.cisa.gov · Machine-written brief

CISA · Advisory ·

A Tale of Two SOCs: Insights From Two Red Team Assessments

CISA conducted red team assessments at two organizations.

The red team achieved full domain compromise and accessed sensitive business systems and cloud resources. Organization A failed to detect the activity, but Organization B identified and contained it. CISA assesses that untuned detection tools and organizational silos hindered effective incident response.

Recommended by the publisher: CISA recommends implementing Conditional Access policies and establishing procedures for detecting cloud compromises.

Read the original at www.cisa.gov · Machine-written brief

CISA · Advisory ·

Defending Against an Active Threat to Siemens S7 Series PLCs

CISA warns of active threat to Siemens S7 Series PLCs.

The threat concerns Siemens S7 Series PLCs, including S7-200, S7-300, S7-400, S7-1200, and S7-1500 Series. Threat actors are using AI-generated exploitation scripts to target these devices. Exploitation could lead to disruption of critical industrial processes.

Recommended by the publisher: CISA recommends applying critical security patches and strengthening access controls.

Read the original at www.cisa.gov · Machine-written brief

CISA · Advisory ·

#StopRansomware: Gunra Ransomware

Read the original at www.cisa.gov

CISA · Advisory ·

Russian State-Supported Cyber Actors Conduct Phishing Campaign Targeting Users of Zimbra Collaboration Suite

Read the original at www.cisa.gov

CISA · Advisory ·

Improve Router Hygiene to Protect Against Russian State-Sponsored Targeting

Read the original at www.cisa.gov

CISA · Advisory ·

Defending Against China-Nexus Covert Networks of Compromised Devices

Read the original at www.cisa.gov

CISA · Advisory ·

Iranian-Affiliated Cyber Actors Exploit Programmable Logic Controllers Across US Critical Infrastructure

Read the original at www.cisa.gov

CISA · Advisory ·

Pro-Russia Hacktivists Conduct Opportunistic Attacks Against US and Global Critical Infrastructure

Read the original at www.cisa.gov

CISA · Advisory ·

CISA Shares Lessons Learned from an Incident Response Engagement

Read the original at www.cisa.gov