CISA issued an alert on exploitation of critical zero-day vulnerabilities in Citrix NetScaler ADC and NetScaler Gateway, noting confirmed malicious activity involving at least some of them. The alert references Citrix bulletins for CVE-2026-107406, CVE-2026-88779 and CVE-2026-88771 through CVE-2026-88778. Because NetScaler updates can be …
CISA, the FBI, the U.S. Secret Service and international partners issued a joint advisory on SafePay ransomware. The group has been highly active since August 2024 and has compromised roughly 600 organizations across multiple critical infrastructure sectors in the Americas, Europe and Australia. The FBI describes it as one of 2026's most …
A joint StopRansomware advisory (AA26-293A) from CISA, the FBI, the USSS, Germany's Landeskriminalamt Rheinland-Pfalz, the UK's National Crime Agency and the North West Regional Organised Crime Unit details SafePay ransomware activity observed through August 2026 (cisa.gov). The group has been active since August 2024 and has compromised …
F5 Labs, using Efflux sensor telemetry, analyzed December 2025 exploitation of React2Shell (CVE-2025-55182), a CVSS 10.0 unsafe deserialization RCE in React Server Components. It was disclosed on 3 December 2025 and rose to second place among the most exploited CVEs, behind only CVE-2017-9841. Within days of disclosure, actors moved from …
The PHP security team released emergency fixes on October 21, 2026 for two critical core flaws, CVE-2026-109618 and CVE-2026-109619, nicknamed PHP2Shell. Both are rated CVSS v4.0 9.2 and allow unauthenticated remote code execution (RCE) as the web worker account. They can also expose process memory that may hold credentials and API keys (…
ConnectWise suspended Cloud Backup (formerly SkyKick), SaaS Security and Cloud Management after unknown actors gained unauthorized access to its application identities and used them to sign in to customers' Microsoft 365 tenants. ConnectWise says it identified the incident on October 14, 2026 (thehackernews.com) and began mitigations on O…