Is CVE-2021-4462 actively exploited?

Yes. CVE-2021-4462 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2021-4462 be exploited remotely?

The attack vector of CVE-2021-4462 has not been classified yet.

What is the CVSS score of CVE-2021-4462?

CVE-2021-4462 has not received a CVSS score yet.

HOME VULNERABILITIESCVE-2021-4462

UNKNOWNCISA KEVIN THE WILD

CVE-2021-4462

Published: April 11, 2026

EPSS:19.10%probability of exploitation in 30 daysPercentile:95.3th

Official Description

Employee Records System version 1.0 contains an unrestricted file upload vulnerability that allows a remote unauthenticated attacker to upload arbitrary files via the uploadID.php endpoint; uploaded files can be executed because the application does not perform proper server-side validation. Exploitation evidence was observed by the Shadowserver Foundation on 2025-02-06 UTC.

NVD Source

Technical Analysis

CVE-2021-4462 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CISA has added CVE-2021-4462 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.