This week in Wordfence Security News (Week of Apr 27, 2026):

A critical unauthenticated arbitrary file upload vulnerability in BreezeCache, a caching plugin with over 400,000 active installations, went from disclosure to mass exploitation in under 24 hours with over 22,000 exploit attempts blocked across nearly 5,000 sitesAttackers published a malicious version of the Bitwarden CLI package on NPM that harvested credentials from six different sources including SSH keys, cloud secret stores, and AI assistant configs during a 93-minute window before removalThe Bitwarden supply chain attack connects to a broader campaign targeting Checkmarx, with Team PCP claiming responsibility and links to the Shai-Hulud self-propagating NPM worm from 2025Home security giant ADT confirmed a data breach after ShinyHunters listed the company on its leak site, with Have I Been Pwned tracking 5.5 million unique email addresses tied to the breachShinyHunters used a voice phishing attack to compromise an ADT employee's Okta SSO account and pivot to Salesforce, highlighting why phishing-resistant MFA like FIDO2 or WebAuthn is critical over SMS or TOTPA 12-year-old privilege escalation vulnerability dubbed Pack2TheRoot in PackageKit lets any local unprivileged user install arbitrary packages as root, affecting Ubuntu, Debian, Fedora, and Rocky Linux since 2014Timestamps:

0:00 Introduction0:34 BreezeCache Critical File Upload Vulnerability and Mass Exploitation3:50 Bitwarden CLI Supply Chain Attack via NPM6:25 ADT Data Breach by ShinyHunters7:49 Why Phishing-Resistant MFA Matters8:54 PackageKit Privilege Escalation Vulnerability

Story Links:

Breeze Cache — Active Exploitation (CVE-2026-3844): https://www.wordfence.com/threat-intel/vulnerabilities/id/e342b1c0-6e7f-4e2c-8a52-018df12c12a0Bitwarden CLI Compromised in Checkmarx Supply Chain Attack: https://thehackernews.com/2026/04/bitwarden-cli-compromised-in-ongoing.htmlSharePoint Patching Laggards — CVE-2026-32201: https://www.bleepingcomputer.com/news/security/over-1-300-microsoft-sharepoint-servers-vulnerable-to-ongoing-attacks/ADT Confirmed in ShinyHunters Breach: https://www.bleepingcomputer.com/news/security/adt-confirms-data-breach-after-shinyhunters-leak-threat/Pack2TheRoot — 12-Year-Old PackageKit Privilege Escalation (CVE-2026-41651): https://github.security.telekom.com/2026/04/pack2theroot-linux-local-privilege-escalation.htmlStay informed and secure: get the latest WordPress security news on the Wordfence blog or subscribe to the WordPress Security Newsletter.

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Erscheinungs­datum: 4.5.2026, 22:02:37