Verified status as of June 27, 2026
Checked by defend.network against the NIST National Vulnerability Database (NVD) and CISA’s Known Exploited Vulnerabilities catalog.
- CVE-2026-20245 in Cisco Catalyst SD-WAN Manager is listed in CISA’s Known Exploited Vulnerabilities (KEV) catalog (added 2026-06-09; federal remediation due 2026-06-23). NVD rates it 7.8 (HIGH) on CVSS v3.1. NVD lists a vendor advisory.
TL;DR
Lantronix EDS5000 critical flaw actively exploited; CISA mandates patching by June 26. Amadey and StealC malware networks dismantled in law enforcement operation recovering 27M credentials. Cordyceps CI/CD weakness exposes 300+ GitHub repositories to supply-chain compromise.
Executive Summary
- CISA warns of active exploitation of Lantronix EDS5000 Series devices; federal agencies ordered to patch by June 26, 2026.
- Microsoft and law enforcement partners disrupted Amadey and StealC malware infrastructure, recovering 27 million stolen credentials.
- Cordyceps CI/CD vulnerability pattern discovered affecting 300+ GitHub repositories, enabling supply-chain workflow hijacking.
- New malicious Microsoft Edge extension (Edgecution) abuses Native Messaging to escape sandbox and deploy Python backdoor in ransomware attacks.
- Cisco SD-WAN zero-day (CVE-2026-20245) exploited to create rogue root accounts on targeted systems.
Top Threats Today
1. Lantronix EDS5000 Critical Flaw in Active Exploitation
Severity: CRITICAL Affected: Government Infrastructure
CISA has warned of active exploitation of a critical security flaw in Lantronix EDS5000 Series devices and is mandating that Federal Civilian Executive Branch agencies apply fixes by June 26, 2026 [1]. The vulnerability details remain limited in available reporting, but the active-exploitation status and federal remediation deadline indicate imminent risk to operational technology and critical infrastructure networks.
Sources:[1] The Hacker News
Recommended Action
- Identify all Lantronix EDS5000 Series devices in your network inventory immediately.
- Apply available security patches before June 26 deadline or isolate affected devices if patching is not feasible.
- Monitor CISA advisories and Lantronix vendor bulletins for detailed patch guidance and technical indicators.
- Review network segmentation around serial-to-ethernet and out-of-band management devices.
2. Amadey and StealC Malware Networks Dismantled; 27M Credentials Recovered
Severity: HIGH Affected: Technology
A coordinated law enforcement operation involving Microsoft, Bitdefender, Bitsight, and ESET has resulted in the takedown of criminal infrastructure powering Amadey ⚠ and StealC malware families [1][2]. The operation disrupted more than 300 servers and recovered 27 million stolen credentials ⚠[1][2]. According to Microsoft, the operation targeted the full cybercrime “supply chain” of these malware operations [2]. This represents a significant disruption of widely-used credential-stealing malware families that have targeted enterprise and consumer systems globally.
Sources:[1] The Hacker News[2] The Record[3] SecurityWeek
Recommended Action
- Check Microsoft and Bitdefender threat intelligence feeds for indicators of compromise linked to Amadey and StealC command-and-control infrastructure.
- If your organization uses credentials that may have been in compromised lists, reset passwords and review account access logs for unauthorized activity.
- Deploy or update antimalware signatures to detect Amadey and StealC variants and monitor for command-and-control callbacks.
- Review your incident response logs to determine if your systems were infected by either malware family before the takedown.
3. Cordyceps CI/CD Pattern Exposes 300+ GitHub Repositories to Supply-Chain Hijacking
Severity: HIGH Affected: Technology
Cybersecurity researchers at Novee Security have identified a new class of CI/CD workflow weakness codenamed “Cordyceps” that enables attackers to hijack GitHub workflows and compromise open-source supply chains [1]. The critical exploitable pattern has been found affecting 300 or more GitHub repositories [1]. The flaw allows full attacker control of repositories, representing a supply-chain attack vector that can inject malicious code into widely-distributed software.
Sources:[1] The Hacker News
Recommended Action
- Audit your GitHub Actions workflows for overly permissive permissions and external trigger conditions that could enable unauthorized code injection.
- Implement branch protection rules requiring code review and limiting who can modify workflow definitions.
- Monitor GitHub Actions execution logs for anomalous workflow runs or commits from unexpected sources.
- Review dependencies on third-party GitHub Actions and consider pinning versions to specific commit SHAs rather than branch tags.
4. Malicious Microsoft Edge Extension Deploys Python Backdoor via Native Messaging
Severity: HIGH Affected: Technology
A malicious Microsoft Edge extension dubbed “Edgecution” has been used in ransomware attacks to escape the browser sandbox and deploy a Python-based backdoor [1]. The attack abuses Native Messaging functionality to bridge from the browser into the broader system, enabling installation of persistent malware on compromised systems.
Sources:[1] BleepingComputer
Recommended Action
- Audit installed Microsoft Edge extensions across your organization and remove any unfamiliar or suspicious extensions.
- Implement policies to restrict Edge extension installation to an approved organizational list.
- Monitor for suspicious Native Messaging activity between browser processes and system executables.
- If ransomware recovery is needed, isolate affected systems and engage incident response before restoring from backups.
5. Cisco SD-WAN Zero-Day Used to Create Rogue Root Accounts
Severity: HIGH Affected: Technology
Mandiant has revealed details on exploitation of a Cisco Catalyst SD-WAN vulnerability tracked as CVE-2026-20245 in zero-day attacks to create rogue root accounts on targeted devices [1]. The flaw provides attackers with persistent administrative access to SD-WAN appliances, which control critical network traffic across enterprise networks.
Sources:[1] BleepingComputer
Recommended Action
- Contact Cisco immediately for availability of patches for Catalyst SD-WAN appliances in your environment.
- Review Cisco SD-WAN device logs for suspicious user account creation or administrative access from unfamiliar sources.
- Implement out-of-band monitoring and segmentation of SD-WAN management interfaces to limit attack surface.
- If compromise is suspected, plan for device reimaging and credential rotation across affected network segments.
Today’s Action Checklist
- ☐ URGENT: Identify and patch all Lantronix EDS5000 Series devices before June 26 deadline or implement compensating controls.
- ☐ URGENT: Audit Cisco Catalyst SD-WAN appliances for unauthorized root accounts and check Mandiant/Cisco threat feeds for CVE-2026-20245 IOCs.
- ☐ HIGH: Review GitHub Actions workflows and branch protection settings; audit Edge extensions across organization.
- ☐ HIGH: Check if organization credentials appear in 27M-record set recovered from Amadey/StealC takedown; reset passwords if exposed.
- ☐ STANDARD: Update antimalware signatures for Amadey and StealC variants and block known C&C infrastructure.