grep -rl "cisa" ./articles
Mandiant's analysis of two Citrix NetScaler zero-days describes root access won through a DTLS handshake on UDP 443, then an appliance reconfigured so that a request for a missing interface icon returns a PHP web shell inside a 404. The persistence it leaves behind survives the update, which is why CISA's alert asks organisations to look for compromise first.
NSA, CISA and the FBI accuse six Chinese AI firms of extracting billions of tokens from Claude, GPT, Gemini and Grok since late 2024. No system was breached — the models were queried through the front door. The recommended countermeasure is to subtly alter what suspected accounts get back.
LiteLLM falls back to empty credentials after a failed API key check, so any bearer token opens an authenticated MCP session. Starlette lets a single malformed character in the Host header walk past path-based auth. Five of the seven additions carry a three-day deadline.
CISA's review of 2024 and 2025 finds that the flaws attackers actually use are injection, input validation and path traversal — the same list as two decades ago. Seven of the ten most frequent weaknesses on the exploited-vulnerabilities catalog account for 41.5% of everything on it. CISA blames culture and workflow, not difficulty.
Advisory AA26-237A describes simultaneous red team assessments using similar tradecraft against a government services body and a water utility. Both were compromised at the domain level. One detected each phishing payload as it executed and isolated the machines within 2 to 20 minutes. The other saw nothing, and the red team read its security team's email to check.
Two critical bugs in TrueConf Server, patched in June, are being used by Head Mare to plant PhantomCore. Kaspersky says the attackers replaced a server file with a web shell and pushed malicious client installers. CISA added both to its exploited catalogue on 20 August with two different deadlines.
The NSA, CISA, FBI, Department of Energy and EPA issued a joint advisory on Siemens S7 controllers. The exploitation scripts are Python built on snap7, they masquerade as legitimate OT monitoring tools, and they give read and write access to PLC memory and ladder logic. The assessed purpose is not disruption yet — it is being ready for it.
A joint CISA, FBI and HHS advisory puts Medusa past 500 US critical infrastructure organisations as of April 2026, up from 300-plus in March 2025. The number that explains the growth is not the victim count: it is the $100 to $1 million the operation pays initial access brokers.
CVE-2026-33824 is a double free in the Windows IKE Service Extensions, reachable by anyone who can send a UDP packet to port 500 or 4500. Microsoft fixed it in April without flagging exploitation. CISA added it to the exploited catalogue on 18 August and set a three-day patch deadline, which is not what that directive normally allows.
CVE-2026-45659 was patched in May, flagged as exploited on 1 July with a three-day federal deadline, and marked as used in ransomware on 11 August. Of 8,500 SharePoint servers exposed online, 200-plus remain vulnerable.
51 victims since April 2025, mostly outside North America, exploiting a 2024 Schneider Electric flaw and a 2025 Fortinet one. The advisory is worth reading for what it says about which patches actually matter.