Multiple directory traversal vulnerabilities in src/acloglogin.php in Wangkongbao CNS-1000 and 1100 allow remote attackers to read arbitrary files via a .. (dot dot) in the (1) lang or (2) langid cookie to port 85.
Improper Limitation of a Pathname to a Restricted Directory The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.