The mainland's state broadcaster targeted Nikon cameras, Australian milk producer OZDairy and a unit of Datang in its annual consumer rights programme.
The Nikon D600 camera produced pictures with black spots and customer service did not adequately resolve the issue, China Central Television reported on Friday, citing users.
Dates on OZDairy's OZ Milko baby-formula cans were altered, and a business owned by Datang's Gohigh Data Networks Technology helped plant software in mobile phones to collect private information, it said.
Nikon and OZDairy are the latest companies featured in CCTV's 315 Gala, a show aired annually on March 15 to mark World Consumer Rights Day.
The programme highlights the state media's role in bringing allegations against foreign and Chinese companies that then may be pursued by government agencies.
The Japanese camera maker would offer free after-sales service to owners of its D600 digital camera, in line with a statement posted last month on the firm's website, spokesman Ryota Satake said. Nikon was aware of the issue with the camera and "aims to offer the same standard service for customers all over the world", he said.
Among other products or companies highlighted in the CCTV programme were laser pointers sold as toys that hurt children's eyes and skin, a producer of coloured contact lenses said to impair sight, silver-trading entities accused of profiting from investor losses and computer viruses alleged to steal from online shoppers.
Concerns over food and drug safety have spurred the government to pledge greater consumer protection. Milk tainted with melamine, a toxic chemical used to make plastic and tan leather, was blamed for the deaths of at least six babies in 2008, with tens of thousands of children hospitalised.
The government last year investigated companies that paid doctors to drum up drug sales, and cracked down on crime rings selling adulterated meat.
The number of consumer complaints received last year by the State Administration for Industry and Commerce's 12315 hotline exceeded one million for the first time, following a 14 per cent jump, compared with an average 5.6 per cent increase in the past five years, according to a statement on the agency's website on Friday.
Mobile phones, online and television shopping, telecommunication services, repairs and cars were among areas citizens complained the most about, the agency said.