What is ICS Patch Tuesday?

Monthly-ish roundup where industrial vendors like Siemens drop security fixes for operational tech—PLCs, switches, HMIs. Critical for factories, grids, avoiding hacks.

Should I disconnect my PLCs from the internet?

Yes, per Rockwell. Iran groups love 'em. Use VPNs or air-gap if possible—don't be low-hanging fruit.

Which ICS vulnerability is most dangerous right now?

Aveva's Pipeline Simulation critical auth bypass. Privilege escalation in sim software controlling real pipes? Patch first.

🕳️ Vulnerabilities & CVEs

ICS Patch Tuesday: 8 Giants Patch Critical Flaws

Eight industrial behemoths just unleashed a barrage of security advisories. From critical auth bypasses to Iran-linked PLC hacks, it's a wake-up call for ICS neglect.

CVE Watch Apr 16, 2026 4 min read

Collage of industrial control system logos with red vulnerability warning overlays

⚡ Key Takeaways

Siemens leads with 9 advisories, including critical Wi-Fi flaws and high-sev code exec. 𝕏
Rockwell urges disconnecting PLCs from internet amid Iran-linked threats. 𝕏
Critical auth bypass in Aveva Pipeline Simulation—oil/gas ops, beware. 𝕏
Third-party components plague ABB, Mitsubishi; supply chain risks persist. 𝕏