Network Security

Cybersecurity
Russian Actor Uses AI to Exploit PaperCut, Hits 440+ Organizations
Russian threat actor deployed hundreds of AI agents to exploit PaperCut vulnerabilities, compromising 395-440+ organizations between August 15 and September 8.
Application Security
UNC3569 Exploits Sogou Input Method to Deploy GRAYRABBIT Backdoor
China-linked UNC3569 exploited a vulnerability in Tencent's Sogou Input Method, one of the most widely used Chinese typing tools for Windows, to install GRAYRABBIT backdoor ...
Cybersecurity
Surfshark VPN Breach Exposes Internal Testing and Proxy Servers
Surfshark disclosed that hackers accessed internal test servers and proxy infrastructure after a configuration error exposed testing systems to the public internet on September 10.
Application Security
Citrix NetScaler CVE-2026-19490 Exploited Since September 3
Critical authentication bypass vulnerability CVE-2026-19490 in Citrix NetScaler has been actively exploited since September 3, enabling unauthenticated attackers to bypass authentication controls.
CVE Vulnerability Alerts
CISA Sets September 12 Deadline for Cisco, Citrix, Fortinet Flaws
CISA added three actively exploited vulnerabilities in Cisco, Citrix, and Fortinet products to its KEV catalog on September 10, requiring federal agencies to patch by ...
Application Security
Infostealer Logs Expose Replayable AI Tokens That Bypass MFA
Cybercriminals harvest AI session tokens from infostealer malware logs to hijack Google, Anthropic, and OpenAI accounts, bypassing MFA through token replay attacks published September 9.
Application Security
Google Patches Seventh Chrome Zero-Day of 2026, CVE-2026-87491
Google released Chrome security update on September 9 patching CVE-2026-87491, an out-of-bounds write in V8 engine — the seventh actively exploited Chrome zero-day of 2026.
Application Security
PoisonedRefresh Rootkit Injects PHP Web Shells into F5 BIG-IP Memory
SophosLabs published analysis of PoisonedRefresh, a fileless Linux rootkit that injects PHP web shells directly into F5 BIG-IP APM Apache server memory, leaving no disk ...
Application Security
September Windows Server Updates Break Remote Desktop Services
Microsoft's September security updates cause Remote Desktop Services failures on Windows Server 2019, 2022, and 2025, with some systems requiring hard reset reported September 10.
Application Security
PEEP Toolkit Turns Chrome and Edge Into Post-Exploitation Backdoors
Researchers disclosed PEEP, a toolkit that hijacks Chrome and Edge browsers as backdoors by injecting malicious extensions that execute host commands.