Daily Cybersecurity News Roundup – July 21, 2026

Stay updated with the latest cybersecurity developments! This daily roundup highlights critical vulnerabilities, active exploits, data breaches, threat actor activities, and industry responses in the fast-evolving digital threat landscape. With rising AI-driven attacks and sophisticated espionage, proactive patching and monitoring remain essential.

1. WP2Shell WordPress Core Vulnerabilities Exploited in the Wild

Published: July 17-20, 2026

A critical pre-authentication remote code execution (RCE) chain dubbed WP2Shell (CVE-2026-63030 and CVE-2026-60137) affects WordPress versions 6.9.0–6.9.4 and 7.0.0–7.0.1. It combines REST API route confusion with SQL injection, allowing unauthenticated attackers to achieve full site compromise without plugins or login. WordPress issued emergency patches in 6.9.5 and 7.0.2 with forced auto-updates; public PoCs and in-the-wild exploitation emerged shortly after disclosure.

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2. OpenSSL Silently Patches ‘HollowByte’ DoS Vulnerability

Published: Mid-July 2026 (patched June)

Okta’s red team discovered HollowByte, a denial-of-service flaw in OpenSSL allowing unauthenticated attackers to exhaust server memory with just an 11-byte TLS handshake payload by triggering oversized buffer pre-allocations that aren’t freed (especially on glibc systems). Fixed silently in OpenSSL 4.0.1 and backported versions (3.6.3, 3.5.7, etc.) via incremental buffer growth. Impacts many servers, runtimes, and databases.

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3. SonicWall Zero-Days Exploited for Custom Malware Delivery

Published: Recent (July 2026 reports)

Threat actor UTA0533 exploited two SonicWall zero-days (CVE-2026-15409 and CVE-2026-15410) for weeks before patching to deliver custom malware. Highlights ongoing risks in perimeter security appliances and the need for rapid vendor response.

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4. Microsoft July 2026 Patch Tuesday Addresses Record ~570-627 Vulnerabilities

Published: July 14-20, 2026

Microsoft fixed a record number of flaws (reports vary 569–627 CVEs), including critical ones and some zero-days. An out-of-band update (KB5121767) addressed Dell PC shutdown/performance issues post-July update. AI-assisted discovery contributed to the high volume.

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5. Ernst & Young Data Breach Exposes Personal and Financial Data

Published: Recent

Hackers accessed names, addresses, SSNs, credit/debit card info, and more via a third-party management platform. Underscores third-party supply chain risks for professional services firms.

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6. Hugging Face Breached via Autonomous AI Attack

Published: Recent

The world’s largest AI model repository suffered a breach targeting production infrastructure, compromising internal datasets and credentials through an autonomous AI agent. Signals growing threats to AI supply chains.

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7. Nichirei Frozen Food Giant Hit by Cyberattack Disrupting Operations

Published: July 17, 2026

A cyber incident disrupted operations at the Japanese company, part of broader reports on industrial and supply chain targeting.

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8. Scattered Spider Members Face Ongoing Legal Actions and Sentencings

Published: July 2026 updates

Recent arrests, extraditions (e.g., teen Peter Stokes), and sentencings of Scattered Spider affiliates involved in high-profile retailer attacks continue, showing law enforcement pressure on the group.

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Stay Vigilant

Cyber threats, amplified by AI tools and autonomous agents, continue to accelerate. Update WordPress, OpenSSL, Microsoft systems, and monitor supply chains immediately. Subscribe for daily/weekly updates and implement layered defenses like zero-trust, regular patching, and anomaly detection. Stay safe online!

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