[1][15][16] In April 2024, European Commission authorities raided the offices of Nuctech in Poland and the Netherlands as part of an investigation into breaches of the EU Foreign Subsidies Regulation.

[30] Nuctech security equipment is in use at airports across Europe, including in Spain, Italy, Cyprus and the United Kingdom and by customs and border agencies in Ireland and Finland.

[1][31][32] The company also reported contracts in countries including Syria, Australia, Turkey, Iran, Belgium, Venezuela, Zimbabwe, Norway and South Korea.

[2][35] The company's ties to the Chinese Communist Party and CNNC have raised concerns from some countries about data security, including Canada and Lithuania.

[36] A Lithuanian special governmental commission that vets deals for national security impact on August 12, 2021, approved the purchase and installation of Nuctech X-ray equipment at the Belarusian border.

[37] In 2022, several members of the European Parliament issued a letter challenging a tender to award Nuctech for scanners in the Strasbourg Airport due to security concerns.

In 2016, it was reported that the Commission on Audit of the Philippines (COA) found that the contract had been "exorbitantly overpriced," that a much lower quotation existed from another supplier, and that maintenance costs were higher for Nuctech products.

[39] In July 2009, it was reported that Nuctech was accused of "illegal dumping" by Smiths Group and that an anti-dumping investigation by the European Union (EU) was ongoing.

[7] On July 21, 2009, a Nuctech representative and two Namibians were arrested after the Anti-Corruption Commission of Namibia (ACC) discovered that a US$12.8 million down payment on 13 scanners had been diverted to a firm called Teko Trading.

[44][45][46][23][47][48] Namibian prosecutors charged the three with joining in a bribery scheme that secured a $55.3 million contract in May 2008 to install Nuctech scanners at customs inspection points across Namibia.