Editorial Team - DIESEC

June 2026 Cybersecurity Roundup: Supply Chain Breaches, Data Extortion, and Critical CVEs

By Editorial Team | July 8, 2026

This June 2026 Cybersecurity Roundup lands in a month when the FIFA World Cup kickoff dominated the conversation, with most attention on cyber threats and fraud tied to the tournament. Away from the headlines, though, June’s most consequential incidents ran through SaaS supply chains, ransomware-driven data extortion, and identity compromise. Here’s a roundup of the…

OPNsense CVE-2026-57155: Root RCE via GeoIP Alias

By Editorial Team | July 7, 2026

OPNsense CVE-2026-57155 (CVSS 9.9) is a path-traversal flaw in the firewall’s GeoIP alias importer that lets a low-privileged user escalate to full root remote code execution. It is the fifth critical or high-severity OPNsense vulnerability disclosed since May 2026, and it matters disproportionately for German Mittelstand IT teams and MSPs because OPNsense’s free, open-source model…

SharePoint RCE CVE-2026-45659: Active Exploits

By Editorial Team | July 6, 2026

SharePoint RCE CVE-2026-45659 is now under active exploitation, and the federal patch deadline set by the U.S. Cybersecurity and Infrastructure Security Agency (CISA) is July 4 — tomorrow. The CVSS 8.8 deserialization flaw lets any authenticated user with nothing more than baseline Site Member permissions run code remotely on the server. Shadowserver currently counts more…

Azure CLI Password Spray Bypasses MFA

By Editorial Team | July 3, 2026

An Azure CLI password spray campaign made more than 81 million login attempts against Microsoft accounts over two weeks and successfully compromised 78 accounts across 64 organizations — a meaningful share of which believed multi-factor authentication already protected them. The attackers did not break MFA. They found a legacy authentication path that most Conditional Access…