Week in review: Compromised Zimbra servers, previously patched Citrix NetScaler flaw exploited – Help Net Security

Week in review: Compromised Zimbra servers, previously patched Citrix NetScaler flaw exploited – Help Net Security

By Anamarija Pogorelec
Publication Date: 2026-08-30 08:00:00

Here’s an overview of some of last week’s most interesting news, articles, interviews and videos:

Unpatched Zimbra servers are falling to CVE-2026-73570 attacks
At least 274 internet-facing Zimbra instances have been compromised by unknown attackers via CVE-2026-73570, the Shadowserver Foundation shared on Monday.

AI supply chain risk is showing up in developer workflows first
In this Help Net Security interview, Dr. Jaushin Lee, CEO of Zentera Systems, discusses where AI supply chain risk shows up. He says most incidents still hit developer workflows and open-source package repositories, while poisoned model weights and compromised MCP servers stay mostly in research demos.

Suspected Iran-linked attack knocked UK power plant offline for days
News that suspected Iranian hackers caused the shutdown of a British power plant broke over the weekend, raising the question of whether UK’s power grid and, indeed, the country’s critical infrastructure can fend off destructive…