Is CVE-2021-21983 actively exploited?

Yes. CVE-2021-21983 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2021-21983 be exploited remotely?

The attack vector of CVE-2021-21983 has not been classified yet.

What is the CVSS score of CVE-2021-21983?

CVE-2021-21983 has not received a CVSS score yet.

HOME VULNERABILITIESCVE-2021-21983

UNKNOWNCISA KEVIN THE WILD

CVE-2021-21983

Published: April 11, 2026

EPSS:83.18%probability of exploitation in 30 daysPercentile:99.3th

Official Description

Arbitrary file write vulnerability in vRealize Operations Manager API (CVE-2021-21983) prior to 8.4 may allow an authenticated malicious actor with network access to the vRealize Operations Manager API can write files to arbitrary locations on the underlying photon operating system.

NVD Source

Technical Analysis

CVE-2021-21983 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-2021-21983 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.