# US agencies warn refrigeration hacks threaten critical infrastructure

_Published Thursday, November 5, 2026 at 3:07 PM EST · Security, Infrastructure · Latest · Tier 1 — Major_

![US agencies warn refrigeration hacks threaten critical infrastructure — Primary](https://techcrunch.com/wp-content/uploads/2026/11/freezer-hacks-2299339780.jpg?resize=1200,800)

CISA, the FBI and other US agencies warned Thursday that hackers are compromising internet-connected refrigeration and cold-chain monitoring systems serving critical infrastructure. Attacks across the United Kingdom and Europe have raised freezer temperatures, spoiled food and destroyed produce in at least a dozen countries, TechCrunch reported.

A French blood bank stopped an attack before it compromised blood supplies, while the Defense Department is investigating hacks of military freezers. Agencies urged operators to disconnect remote controls from the internet, strengthen passwords, patch systems and retire unsupported equipment. Some affected refrigeration units were made by Danfoss, which had stopped providing security updates. The US has not formally attributed the attacks.

## Sources

- [TechCrunch](https://techcrunch.com/2026/11/05/u-s-government-warns-of-ongoing-cyber-threat-amid-mass-hacks-of-industrial-retail-and-military-freezers/)

---
Canonical: https://techandbusiness.org/newswire/ahxZaohtm49eX59ACeD9xe
Published: 2026-11-05T20:07:00.092Z
Story chronology: 2026-11-05T18:48:34.000Z
Retrieved: 2026-11-06T22:48:08.706Z
Publisher: Tech & Business (techandbusiness.org)