Google translate: "community can support me with firmware 15.3.3 standalone industrial wireless access point"
I guess you're asking if somebody can provide you with 15.3.3 IOS (firmware) for an access point?
NO - Cisco software is only available to download for licensed Cisco customers with software support contracts (or for some products with lifetime support included or specific security defects). Sharing is not allowed.
Also you need to know the exact model of AP before you can look for the software and you need to know exactly what release you are looking for (there are many 15.3.3 releases). For example the latest release for the Industrial Wireless 3702 Access Point is at https://software.cisco.com/download/home/286287624/type/284180979/release/15.3.3-JPK1
If you don't have access to that you could try contacting the reseller you bought the AP from or sometimes a search for the file name can be helpful.
You could also read the Customers Without Service Contracts section of https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190717-aironet-dos very carefully and then contact the Cisco TAC via email with the requested information to ask them to provide a fixed version of software for your AP. You must refer to the URL of that advisory otherwise your request will not be considered. The full list of fixed releases is at https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvg95745
