Intrusions

Vulnerability

6 Intrusions stories since Dec 2025.

6: stories
SEP 29: latest

Tangled web of white lines and nodes labelled X, Y, 1 and 2 on black

Inside the Citrix NetScaler Zero Day Saga

This case is yet another reminder just how important vendor communication is in such incidents and how much uncertainty can hamper security.

DENNIS FISHER · SEP 29 · 1 min

Weathered grey stone wall split by a deep jagged crack

Ransomware

Check Point VPN Flaw Targeted by Ransomware Actors

DENNIS FISHER · JUN 8 · 2 min

Server racks in a dark data centre, tangled orange and teal cables and green lights

Cisco

Cisco CVE-2026-20133 Targeted in Active Attacks

DENNIS FISHER · APR 22 · 2 min

All Intrusions · Vulnerability

JAN 27

Microsoft

Cybercrime and APT Groups Exploiting WinRAR Bug

Exploitation of CVE-2025-8088 in the wild began before disclosure, with attacks confirmed as early as July 18, 2025.

Dennis Fisher · 4 min

JAN 22

Fortinet

Fortinet FortiGate Devices Targeted in New Campaign

This activity shares some similarities with a campaign that researchers at Arctic Wolf identified in December. That campaign started soon after Fortinet disclosed two authentication bypass flaws (CVE-2025-59718 and CVE-2025-59719).

Dennis Fisher · 3 min

DEC 8

React

Broad Exploit Activity Targets React2Shell Flaw

The vulnerability was disclosed publicly on Dec. 3 and researchers and threat intelligence teams immediately began seeing opportunistic and targeted exploitation attempts.

Dennis Fisher · 3 min