Agencies strongly encourage immediate investigation of potential compromise of Cisco Catalyst SD-WAN, and full updating and hardening.

The purpose of this Alert is to provide resources for organizations with Cisco Software-Defined Wide-Area Networking (SD-WAN) systems, including Federal Civilian Executive Branch (FCEB) agencies, to address ongoing exploitation of multiple vulnerabilities. Notably, the Cybersecurity and Infrastructure Security Agency (CISA) has added CVE-2026-20127 and CVE-2022-20775 to its Known Exploited Vulnerabilities (KEV) Catalog on Feb. 25, 2026. As a result of the malicious cyber activity and vulnerabilities involving Cisco SD-WAN systems, CISA has outlined requirements for FCEB agencies in Emergency Directive (ED) 26-03 to inventory Cisco SD-WAN systems, update them, and assess compromise.

The purpose of this Alert is to amplify Poland’s Computer Emergency Response Team (CERT Polska’s) Energy Sector Incident Report published on Jan. 30, 2026, and highlight key mitigations for Energy Sector stakeholders. 

CISA released the guidance, Barriers to Secure OT Communication: Why Johnny Can’t Authenticate, which highlights the known issues with insecure-by-design legacy industrial protocols and seeks to understand why the technology to secure these protocols is not widely adopted. CISA developed this guidance in partnership with operational technology (OT) equipment manufacturers and standard development organizations, by interviewing OT asset owners and operators to understand:  

The Cybersecurity and Infrastructure Security Agency (CISA), the Federal Bureau of Investigation (FBI), and the U.K.’s National Cyber Security Centre (NCSC) are releasing this fact sheet to urge defensive action against malicious cyber activity by nation-state threat actors. Nation-state threat actors exploit end-of-support (EOS) edge devices—including, but not limited to, load balancers, firewalls, routers, and virtual private network (VPN) gateways—to gain network access, maintain presence, and compromise sensitive data.

Newly disclosed vulnerability Common Vulnerabilities and Exposures (CVE)-2026-24858 [Common Weakness Enumeration (CWE)-288: Authentication Bypass Using an Alternate Path or Channel] allows malicious actors with a FortiCloud account and a registered device to log in to separate devices registered to other users in FortiOS, FortiManager, FortiWeb, FortiProxy, and FortiAnalyzer, if FortiCloud single sign on (SSO) is enabled on devices.1

In response to the June 6, 2025, Executive Order (EO) 14306, “Sustaining Select Efforts to Strengthen the Nation’s Cybersecurity and Amending Executive Order 13694 and Executive Order 14144,” the Cybersecurity and Infrastructure Security Agency (CISA) is providing and regularly updating the below lists to aid in post-quantum cryptography (PQC) adoption. The lists include hardware and software categories with example types of widely available products that use PQC standards to protect sensitive information.1 The lists focus on categories of available products, typically acquired by the federal government, that utilize cryptographic algorithms. Because PQC-capable products are widely available in the listed categories, organizations should acquire only PQC-capable products when planning acquisitions and procuring products in these categories.  

Russian‑aligned hacktivist groups continue to target UK organisations with disruptive cyber attacks

The NCSC encourages local government and critical infrastructure operators to harden their ‘denial of service’ (DoS) defences