Microsoft Office Excel 2000 through 2004 allows user-assisted attackers to execute arbitrary code via malformed cell comments, which lead to modification of "critical data offsets" during the rebuilding process.
Improper Control of Generation of Code The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.