161,764 Assets on Port 102: Sizing the Industrial Control Surface That AA26-231A Described

ZoomEye measured the industrial controller surface described in joint advisory AA26-231A from NSA, CISA, FBI, DOE, and EPA. Port 102 is accessible on 161,764 devices, 95,395 classified as PLCs, but only 173 match the Siemens S7 fingerprint.

• Port 102 accessible on 161,764 devices per ZoomEye as of September 16, 2026
• 95,395 devices classified as PLCs, only 173 match Siemens S7 fingerprint
• Advisory AA26-231A released August 19, 2026, without CVE or indicators of compromise
• Attacks use scripts on snap7.dll and python-snap7 to read and write PLC memory