CWE-546: Suspicious Comment

Code Examples & CVEs

Demonstrative Examples

The following excerpt demonstrates the use of a suspicious comment in an incomplete code block that may have security repercussions.

BadJava

if (user == null) {                                                                                 // TODO: Handle null user condition.                                                                           }

Source-backed guidance

Additional facts reviewed against primary or authoritative security sources.

Verify controls for CWE-546 with SSDF evidence

Use NIST SSDF verification and vulnerability-response practices to detect CWE-546, Suspicious Comment, throughout the product lifecycle. Derive review questions, static or dynamic checks, and negative tests from the CWE's causal behavior; define the components and lifecycle stages each check covers; and retain findings with enough evidence to distinguish the root cause from symptoms and impacts. Track escapes and false negatives, then improve the verification plan after every confirmed occurrence.

NIST SP 800-218 Secure Software Development Framework — National Institute of Standards and Technology

Address Suspicious Comment during Documentation

MITRE associates mitigation with Documentation; documented detection approaches include Automated Static Analysis; recorded impacts include Quality Degradation. Use these source-defined anchors to turn CWE-546 into implementation, review, and verification checks for the affected component.

CWE-546: Suspicious Comment — MITRE CWE

Triage CWE-546 against known exploitation evidence

Use CISA's Known Exploited Vulnerabilities catalog to test whether a vulnerability mapped to CWE-546, Suspicious Comment, has evidence of exploitation in the wild. Confirm the CVE-to-CWE root-cause mapping independently before attaching the example, then capture the affected product, required action, and remediation deadline. A missing KEV match is not evidence that the weakness is unexploited, and a KEV entry must not be generalized to every occurrence of this CWE.

Known Exploited Vulnerabilities Catalog — Cybersecurity and Infrastructure Security Agency

Apply precise root-cause mapping to CWE-546

Apply MITRE's full root-cause mapping guidance when using CWE-546, Suspicious Comment. Separate weakness language from attacker prerequisites and technical impact, check the entry's abstraction and vulnerability-mapping notes, and prefer the most specific Base or Variant supported by the evidence. Record the rejected alternatives and require an independent review before the mapping is used for remediation trends or program metrics.

CVE to CWE Root Cause Mapping Guidance — MITRE CWE

Validate CWE-546 with root-cause mapping checks

Apply MITRE's root-cause mapping quick tips to CWE-546, Suspicious Comment. Confirm the finding describes the causal weakness rather than an impact or attack pattern, compare the abstraction and mapping notes with plausible alternatives, and have a second reviewer challenge the selection. Preserve the evidence and reasoning so recurring defects can be measured against one consistent identifier.

CVE to CWE Root Cause Mapping Quick Tips — MITRE CWE

Frequently Asked Questions

What is CWE-546: Suspicious Comment?+

CWE-546: Suspicious Comment is a Common Weakness Enumeration (CWE) entry maintained by MITRE. The code contains comments that suggest the presence of bugs, incomplete functionality, or weaknesses. Many suspicious comments, such as BUG, HACK, FIXME, LATER, LATER2, TODO, in the code indicate missing security functionality and checking. Others indicate code problems that programmers should fix, such as hard-coded variables, error handling, not using stored procedures, and performance issues.

What are the security consequences of Suspicious Comment?+

If exploited, CWE-546 (Suspicious Comment) it can compromise Other, leading to outcomes such as Quality Degradation.

How do you prevent or mitigate Suspicious Comment?+

Recommended mitigations for CWE-546 include: Remove comments that suggest the presence of bugs, incomplete functionality, or weaknesses, before deploying the application.

Which programming languages are affected by Suspicious Comment?+

CWE-546 commonly affects Not Language-Specific. Note that weaknesses are often language-agnostic patterns, so secure coding practices apply broadly.

What is the difference between a CWE and a CVE?+

A CWE (Common Weakness Enumeration) like CWE-546 describes a category of software weakness — the underlying flaw type. A CVE (Common Vulnerabilities and Exposures) identifies a specific, real-world vulnerability in a particular product. In short, a CWE is the kind of mistake, and a CVE is an instance of that mistake being found in software.

CWE-546: Suspicious Comment

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