CVE-2021-3926: Rejected CVE Entry - Unused Vulnerability

CVE-2021-3926 Overview

CVE-2021-3926 is a rejected CVE candidate that should not be used or referenced. According to the official CVE record, this candidate number was never assigned to an actual vulnerability and has been formally rejected by the CVE Numbering Authority (CNA).

Critical Impact

This CVE ID is invalid and should not be used. No actual vulnerability exists under this identifier.

Affected Products

• No products are affected - this CVE was rejected and never used

Discovery Timeline

• 2026-01-22 - CVE-2021-3926 published to NVD as REJECTED
• 2026-01-22 - Last updated in NVD database

Technical Details for CVE-2021-3926

Vulnerability Analysis

This CVE entry has been formally rejected and contains no vulnerability information. The rejection notice explicitly states: "DO NOT USE THIS CANDIDATE NUMBER. The CVE was never used."

CVE rejections typically occur when:

• A CVE ID was reserved but the reported issue was determined not to be a security vulnerability
• The issue was a duplicate of an existing CVE
• The CVE ID was reserved but never needed
• The vulnerability report was withdrawn or invalidated

In this case, the candidate number was never assigned to any actual security issue.

Root Cause

Not applicable - this CVE was rejected and does not represent an actual vulnerability.

Attack Vector

Not applicable - no vulnerability exists under this CVE identifier.

Detection Methods for CVE-2021-3926

Indicators of Compromise

• No IOCs exist for this CVE as it was rejected and represents no actual vulnerability
• Any references to CVE-2021-3926 in threat intelligence feeds should be investigated for data quality issues
• Security tools reporting this CVE may need configuration updates

Detection Strategies

• No detection strategies are required as this CVE represents no actual threat
• Review and update vulnerability scanning tools that may incorrectly reference this rejected CVE
• Audit security reports that mention this CVE ID for accuracy

Monitoring Recommendations

• No monitoring is required for this rejected CVE
• Update vulnerability management databases to reflect the rejected status
• Ensure security tools properly handle rejected CVE entries

How to Mitigate CVE-2021-3926

Immediate Actions Required

• No remediation action is required as this CVE was rejected
• Remove any false positive alerts referencing this CVE from security dashboards
• Update vulnerability tracking systems to mark this CVE as rejected/invalid

Patch Information

No patches are required or available. This CVE was rejected and does not represent an actual security vulnerability. Organizations should update their vulnerability management tools to recognize and properly categorize rejected CVE entries.

Workarounds

• No workarounds are necessary as no vulnerability exists
• If your vulnerability scanner reports this CVE, consider updating its vulnerability database
• Contact your security tool vendor if they continue to flag this rejected CVE as a valid issue