# Siemens S7 Series PLC

Type: Technology

Source: Cyber Intelligence Brief — https://getcyberbrief.com/entity/siemens-s7-series-plc-technology
Canonical HTML page: https://getcyberbrief.com/entity/siemens-s7-series-plc-technology

## Timeline

- **2026-09-21**: Governor's office publicly confirms incidents — Ally Sullivan, spokeswoman for Gov. Jared Polis, confirmed the intrusions and stated there was no impact to public safety or water services.
- **2026-08-19**: FBI, NSA, CISA issue Siemens S7 PLC advisory — Federal agencies warned of an active cyber threat to Siemens S7 Series PLCs used in water systems, citing AI-generated exploitation scripts and targeting of internet-connected outdated systems.
- **2026-08**: Foreign actors access two Colorado water utilities — Computer systems at two small private water utilities were accessed and equipment controls changed before operators restored normal operations.

## Recent coverage (1 stories)

### 2 Colorado Water Utilities Hit by Foreign PLC Tampering
2026-09-22 23:37:33 · Sentiment: Negative · Impact: 8/10 · Sources: 2

Two small private Colorado water utilities serving fewer than 200 people suffered unauthorized access in late August 2026, with foreign actors changing equipment controls before operators restored normal operations. The governor's office says it cannot confirm attribution but points to CISA's warning of Iranian-backed targeting of U.S. water systems and Siemens S7 PLCs.
Full story: https://getcyberbrief.com/story/foreign-actors-disrupt-2-colorado-water-systems-cyber

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