Update Oct 22 2026: New sections were added for “Observed Threat Activity and Indicators” and “Mitigations and Recommendations.”

With contributions from James Rodriguez, Gus Stamatinos, and Timmy Lister.

On Sept 27, Citrix released patches for two critical vulnerabilities being exploited in the wild. Based on current information, we confirm there has been no exposure or impact to LevelBlue or our clients. CISA has already added these vulnerabilities to the Known Exploited Vulnerabilities (KEV) list.

A cyber incident affecting a small UK electricity generator in July 2026 resulted in several days of operational unavailability and triggered a government and NCSC response. UK authorities confirmed that the event posed no threat to the wider grid and caused no customer outages. Media reporting described the affected asset as a small gas-fired peaking plant of approximately 15 MW, although the operator, location, technical architecture, and exact attack path remain undisclosed.

Following GreenPlasma, YellowKey and MiniPlasma, RoguePlanet and GreatXML, and LegacyHive, the Nightmare-Eclipse disclosure actor has published ShieldBreak — its latest Windows proof of concept (PoC) released shortly after Microsoft's August 2026 Patch Tuesday.

In light of the water-sector activity described below, we've increased monitoring for related indicators of compromise across our client environments. Please contact your LevelBlue account team with questions specific to your environment.

We at LevelBlue company have decided to do something for the community, with the hopes that more security vendors will follow suit.

The LevelBlue OpsIntel CTI team examined the latest version of the ClickFix campaign, which emerged in early May 2026. The campaign employs a multi-stage phishing delivery chain that impersonates trusted employment and professional networking platforms, such as LinkedIn and Indeed, to lure victims. This variant leverages the legacy Finger protocol through native Windows command-line utilities as part of its delivery process. The threat actors use legitimate Windows tools and portable Python runtimes to execute in-memory shellcode, ultimately deploying a fileless Malware-as-a-Service (MaaS) framework tracked as CastleLoader and a Python-based remote access trojan (RAT). The campaign reflects the continued rise of browser-based social engineering with Living-off-the-Land binaries (LOLBin) and Python-based payload delivery.