Bulletins d'actualité

Classification

TLP:WHITEC0

Publication de l'Agence National de la Sécurité des Systèmes d'Information Les avis sont des documents faisant état de vulnérabilités et des moyens de s'en prémunir

The time of much patching is coming In this week’s newsletter, Martin reflects on what the next iteration of AI tools means for vulnerability discovery and our ability to manage large-scale patch releases.

Ongoing exploitation of Cisco Catalyst SD-WAN vulnerabilities Cisco Talos is tracking the active exploitation of CVE-2026-20182, an authentication bypass vulnerability in Cisco Catalyst SD-WAN Controller, formerly SD-WAN vSmart, and Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage.

Breaking things to keep them safe with Philippe Laulheret Philippe shares his unique journey from French engineering school to the front lines of cybersecurity, explaining how his lifelong love for solving puzzles helps him uncover critical security flaws before they can be exploited.

Microsoft Patch Tuesday for May 2026 — Snort rules and prominent vulnerabilities Microsoft has released its monthly security update for May 2026, which includes 137 vulnerabilities affecting a range of products, including 16 that Microsoft marked as “critical”.

State-sponsored actors, better known as the friends you don’t want Responding to a state-sponsored threat is nothing like responding to ransomware, and the differences can make or break the outcome. Learn why your IR plan might need revisiting, and the factors you should consider.

Unplug your way to better code Cybersecurity concepts — logs, packets, DNS exfiltration, and more — are usually intangible, and its practitioners are prone to mental fatigue, Amy takes a second to yell at you to go touch grass.

Insights into the clustering and reuse of phone numbers in scam emails Talos has recently started to collect and gather intelligence around phone numbers within emails as an additional indicator of compromise (IOC). In this blog, we discuss new insights into in-the-wild phone number reuse in scam emails.

UAT-8302 and its box full of malware Cisco Talos is disclosing UAT-8302, a sophisticated, China-nexus advanced persistent threat (APT) group targeting government entities in South America since at least late 2024 and government agencies in southeastern Europe in 2025.

CloudZ RAT potentially steals OTP messages using Pheno plugin Cisco Talos discovered an intrusion, active since at least January 2026, where an unknown attacker implanted a CloudZ remote access tool (RAT) and a previously undocumented plugin called “Pheno.”

Great responsibility, without great power In this week’s newsletter, Hazel uses International Superhero Day as a springboard to explore why empathy — rather than just technical prowess — is the most essential, underrated superpower for navigating the human side of cybersecurity.

AI-powered honeypots: Turning the tables on malicious AI agents Just as AI brings time-saving advantages to our lives, it brings similar advantages to threat actors. We can take the advantage back. This blog shows how generative AI can be used to rapidly deploy adaptive honeypot systems.

Five defender priorities from the Talos Year in Review With attackers moving faster than ever, it’s easy to feel overwhelmed. This blog breaks down five practical priorities from the Cisco Talos 2025 Year in Review to help defenders focus and prioritize, amidst all the noise.

It pays to be a forever student In this newsletter, Joe discusses why understanding other disciplines can often flow back into the macro and micro of cybersecurity, especially in a world of AI.

UAT-4356's Targeting of Cisco Firepower Devices Cisco Talos is aware of UAT-4356's continued active targeting of Cisco Firepower devices’ Firepower eXtensible Operating System (FXOS). UAT-4356 exploited n-day vulnerabilities (CVE-2025-20333 and CVE-2025-20362) to gain unauthorized access to vulnerable devices.

IR Trends Q1 2026: Phishing reemerges as top initial access vector, as attacks targeting public administration persist Phishing reemerged as the most observed means of gaining initial access, accounting for over a third of the engagements where initial access could be determined. Phishing has not been the top vertical for initial access since Q2 2025.