Defending Against an Active Threat to Siemens S7 Series PLCs

Executive summary Note: This advisory relates to an active threat to Siemens S7 Series programmable logic controllers (PLCs). However, ongoing PLC targeting activity is broader than Siemens PLCs. All PLC owners and operators should apply relevant mitigations to reduce the risk to their devices and systems. The Siemens-specific content in this advisory should be understood and applied as one subset

Back to dashboard

Threat ModerateSingle SourceAgencyConf ConfirmedUnited States · North AmericaPublishedStatus: PublishedCERTOpen original source

Original publisher

CERT

Original source URL

https://www.cisa.gov/news-events/cybersecurity-advisories/aa26-231a

Source country

United States

Reporting region

North America

Language

Institution

CISA US-CERT

Published (UTC)

Aug 19, 2026, 12:00 PM

Ingested (UTC)

Aug 28, 2026, 4:35 AM

Verification

Single Source

BASE INTEL aggregates public reporting. This item is not authored by BASE INTEL. Always review the original publisher before relying on the content.

Defending Against an Active Threat to Siemens S7 Series PLCs
Advisory ID: node-25313
Executive summary Note: This advisory relates to an active threat to Siemens S7 Series programmable logic controllers (PLCs). However, ongoing PLC targeting activity is broader than Siemens PLCs. All PLC owners and operators should apply relevant mitigations to reduce the risk to their devices and systems. The Siemens-specific content in this advisory should be understood and applied as one subset
Severity: moderate
Published (UTC): 2026-08-19T12:00:00.000Z
Source: CERT
Original source: https://www.cisa.gov/news-events/cybersecurity-advisories/aa26-231a

View original source