CrowdSec
2/10CrowdSec Score

Vmware - Information Disclosure (CVE-2021-0027)

Published on24-11-2021
First seen on30-12-2025
Public ExploitCVSS -1/10Vmware - vCenter Server

1816Exploiting IPs reported

The vSphere Web Client (FLEX/Flash) contains an unauthorized arbitrary file read vulnerability. A malicious actor with network access to port 443 on vCenter Server may exploit this issue to gain access to sensitive information.

CrowdSec analysis

CVE-2021-0027 is an Information Disclosure vulnerability affecting Vmware vCenter Server. Unauthenticated attackers can exploit this vulnerability to read arbitrary files on the vCenter Server.

CrowdSec has been tracking this vulnerability and its exploits since 9th of December 2021.

CrowdSec network data shows that most actors exploiting CVE-2021-0027 rely on broad, untargeted scans with minimal filtering. The activity is largely automated and opportunistic in nature. Data from the CrowdSec community also indicates a gradual decrease in attacks targeting CVE-2021-0027. While still present in the wild, exploitation levels have dropped noticeably week-over-week. This may signal that the vulnerability is becoming less relevant or that defenses are improving fast enough for attackers to lose interest.

There are no public exploits for this vulnerability. However, it is usually abused by sending crafted requests to the vCenter Server.

Exploitation

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Detected IPs

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Protection

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Blocklist

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