Help Net Security newsletters: Daily and weekly news, cybersecurity jobs, open source projects, breaking news – subscribe here!

Please turn on your JavaScript for this page to function normally.
security operations
The metrics killing your SOC, and what to use instead

Security operations centres risk being rendered entirely ineffective if organizations measure them using the wrong performance indicators, according to Dave Chismon, CTO for …

Microsoft Teams
Attackers use MS Teams, fake mailbox repair utility to breach organizations

A threat group has penetrated corporate networks by impersonating IT helpdesk staff on Microsoft Teams, tricking employees into downloading malware and surrendering their …

attack
New Mirai variants target routers and DVRs in parallel campaigns

Hidden inside newly discovered botnet malware is an unusual message from its creator: “AI.NEEDS.TO.DIE”. Dubbed “tuxnokill” by researchers at Akamai, …

Progress
Progress Software fixes sneaky WAF bypass vulnerability (CVE-2026-21876)

Progress Software has fixed a slew of high-severity vulnerabilities in MOVEit WAF and LoadMaster, including a flaw (CVE-2026-21876) that may allow attackers to bypass firewall …

Data
Network segmentation projects fail in predictable patterns

Most enterprise networks have segmentation on the roadmap. Many have had it there for years. A survey of 400 U.S.-based network security practitioners who lived through failed …

Anthropic
Testing reveals Claude Mythos’s offensive capabilities and limits

Could Claude Mythos Preview, Anthropic’s latest large language model, be leveraged for fully automated cyber attacks? The UK government’s AI Security Institute …

email
Poisoned “Office 365” search results lead to stolen paychecks

A financially motivated hacking group is targeting Canadian employees with a sophisticated campaign designed to covertly redirect their salary payments into …

Fortinet
FortiClient EMS zero-day exploited, emergency hotfixes available (CVE-2026-35616)

Defused Cyber has spotted a critical Fortinet FortiClient Endpoint Management Server (EMS) zero-day vulnerability (CVE-2026-35616) being exploited in the wild. This time …

Fortinet
Critical Fortinet FortiClient EMS bug under active attack (CVE-2026-21643)

A critical SQL injection vulnerability (CVE-2026-21643) in Fortinet FortiClient Endpoint Management Server (EMS), a management server for FortiClient endpoint agents on …

F5
Attackers are exploiting RCE vulnerability in BIG-IP APM systems (CVE-2025-53521)

A critical unauthenticated remote code execution vulnerability (CVE-2025-53521) in F5’s BIG-IP Access Policy Manager (APM) solution is under active exploitation, the US …

downtime
Your security stack looks fine from the dashboard and that’s the problem

One in five enterprise endpoints is operating outside a protected and enforceable state on any given day, according to device telemetry collected across tens of millions of …

Oracle
Oracle issues emergency fix for pre-auth RCE in Identity Manager (CVE-2026-21992)

Oracle has released an out-of-band patch for a critical and easily exploitable vulnerability (CVE-2026-21992) in Oracle Identity Manager and Oracle Web Services Manager. The …

Don't miss

Cybersecurity news
Daily newsletter sent Monday-Friday
Weekly newsletter sent on Mondays
Editor's choice newsletter sent twice a month
Periodical newsletter released for important security events and breaking news
Weekly newsletter listing new cybersecurity job positions
Monthly newsletter focusing on open source cybersecurity tools