You are configuring Checkmarx for a .NET application. The scan results consistently miss vulnerabilities in a third-party DLL. What is the most likely reason?
Trap 1: The vulnerability is a logic error that static analysis cannot find.
Checkmarx does detect many logic flaws through data-flow and control-flow queries, so attributing the gap to an undetectable logic error misdiagnoses it. Logic-error reasoning fits when reviewing bespoke source with no compiled dependency, not a third-party DLL absent from the analysed source tree.
Trap 2: The .NET framework version is set incorrectly in the project…
Checkmarx analyses source code, so a compiled third-party DLL contains no source for it to inspect; findings there require SCA or dependency scanning instead. It is tempting because framework misconfiguration does cause scan errors, but that produces parsing failures rather than silently missed vulnerabilities in binary dependencies.
Trap 3: The scan engine is set to 'Quick Scan' mode.
Quick Scan mode alters rule coverage and depth, yet Checkmarx still parses source it is given; a third-party DLL ships as compiled bytecode, which the engine cannot decompile into analysable source. Quick Scan would be the right lever when scan duration on source code must be cut.
- A
The vulnerability is a logic error that static analysis cannot find.
Why it fails: Checkmarx does detect many logic flaws through data-flow and control-flow queries, so attributing the gap to an undetectable logic error misdiagnoses it. Logic-error reasoning fits when reviewing bespoke source with no compiled dependency, not a third-party DLL absent from the analysed source tree.
- B
The .NET framework version is set incorrectly in the project settings.
Why it fails: Checkmarx analyses source code, so a compiled third-party DLL contains no source for it to inspect; findings there require SCA or dependency scanning instead. It is tempting because framework misconfiguration does cause scan errors, but that produces parsing failures rather than silently missed vulnerabilities in binary dependencies.
- C
The scan engine is set to 'Quick Scan' mode.
Why it fails: Quick Scan mode alters rule coverage and depth, yet Checkmarx still parses source it is given; a third-party DLL ships as compiled bytecode, which the engine cannot decompile into analysable source. Quick Scan would be the right lever when scan duration on source code must be cut.
- D
The third-party DLL is not configured as a source project or included in the scan scope.
Checkmarx scans source code, so compiled third-party DLLs fall outside its scope unless explicitly added as source projects. The stem's constraint — missing vulnerabilities in that DLL — is satisfied because unscanned binaries yield no findings, regardless of the DLL's actual flaws.
- E
null
Why it fails: A null option supplies no configuration rationale, so it cannot explain missed DLL findings; the real cause lies in how Checkmarx handles compiled binaries. It is tempting only as a placeholder when the actual mechanism — source versus bytecode analysis — is unknown, but it addresses nothing in the scenario.