Decades-old pre-Stuxnet cyber sabotage tool breaks cover, NSA listed it as 'nothing to see here' — fast16 targeted nuclear reactors, dam design, and other high-precision civil engineering software years before Stuxnet broke cover
Security researchers have uncovered fast16, a cyber-sabotage tool that predates Stuxnet by at least five years and targeted high-precision engineering software. The tool subtly altered floating-point calculations in programs used for nuclear reactors, dam design, and physics simulations. Despite its significance, the NSA reportedly labeled fast16 as 'nothing to see here,' indicating it was a protected asset.
- ▪fast16 predates Stuxnet by at least half a decade and targeted critical infrastructure design software.
- ▪The tool introduced subtle, reproducible errors in floating-point calculations within Intel C/C++ compiled executables.
- ▪It was delivered via a wormlet using the svcmgmt.exe file and spread through weak Windows file-share passwords.
- ▪NSA referenced fast16 in a leak with the note '*** Nothing to see here – carry on ***', suggesting it was a classified tool.
- ▪Researchers identified fast16 by tracing Lua virtual machine usage in earlier state-level malware.
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| Publication time | Tue, 28 Apr 2026 11:04:20 +0000 |
| Retrieval time | 2026-04-28T11:11:47.725Z |
| Last seen | 2026-04-28T11:11:47.725Z |
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Software Security Software Decades-old pre-Stuxnet cyber sabotage tool breaks cover, NSA listed it as 'nothing to see here' — fast16 targeted nuclear reactors, dam design, and other high-precision civil engineering software years before Stuxnet broke cover News By Mark Tyson published 28 April 2026 Fast16 appears to be at least half a decade older than Stuxnet. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. (Image credit: Getty Images) Copy link Facebook X Whatsapp Reddit Pinterest Flipboard Email Share this article 3 Join the conversation Follow us Add us as a preferred source on Google Newsletter Subscribe to our newsletter Security researchers have uncovered a cyber-sabotage platform that predates Stuxnet by at least half a…
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