Advancecomp v2.3 was discovered to contain a heap buffer overflow via the component __interceptor_memcpy at /sanitizer_common/sanitizer_common_interceptors.inc.
In AdvanceCOMP 2.1, png_compress in pngex.cc in advpng has an integer overflow upon encountering an invalid PNG size, which results in an attempted memcpy to write into a buffer that is too small. (There is also a heap-based buffer over-read.)