CVE-2021-21985

CRITICAL9.8

CISA KEV

Published 2021-05-26 · Updated 2026-08-12 · Source security@vmware.com

Description

The vSphere Client (HTML5) contains a remote code execution vulnerability due to lack of input validation in the Virtual SAN Health Check plug-in which is enabled by default in vCenter Server. A malicious actor with network access to port 443 may exploit this issue to execute commands with unrestricted privileges on the underlying operating system that hosts vCenter Server.

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE-918CWE-20CWE-470CWE-918

CISA Known-Exploited Vulnerability

Product: VMware — vCenter Server

Name: VMware vCenter Server Improper Input Validation Vulnerability

Date added: 2021-11-03 · Due: 2021-11-17

USED IN RANSOMWARE

Required action: Apply updates per vendor instructions.

References

View on NVD

Related CVEs

Same severity, most recent

CVE-2026-79766
Termix is a web-based server management platform with SSH terminal, tunneling, and file editing capabilities. From 2.4.1 until 2.5.1, an authenticated Termix administrator can store attacker-controlled domain and email values through PATCH /users/acme-ssl-settings and trigger their interpolation into a certbot shell command through POST /users/acme-ssl-request. In src/backend/database/routes/acme-ssl-routes.ts, child_process.execSync invokes /bin/sh -c with those values only wrapped in double quotes, so shell metacharacters can execute arbitrary operating-system commands as the Termix backend process. Both HTTP webroot and DNS Cloudflare challenge modes are affected, and compromise exposes Termix databases, process secrets, stored credentials, and network reachability. This issue is fixed in version 2.5.1.
2026-09-24 · score 9.1
CVE-2026-93425
Dokploy is a free, self-hostable Platform as a Service (PaaS). Prior to 0.29.13, the patch.readRepoDirectories tRPC procedure passes the user-controlled repoPath value from apps/dokploy/server/api/routers/patch.ts into a shell command in packages/server/src/services/patch-repo.ts without safe argument quoting. An authenticated organization member with service:read permission can inject shell metacharacters into repoPath and execute arbitrary commands through child_process.exec as root in the Dokploy container. The supplied service identifier is used only to resolve the server and does not constrain repoPath. Because the standard deployment mounts /var/run/docker.sock, container-root command execution can be used to control Docker and compromise the host and its managed applications. This issue is fixed in version 0.29.13.
2026-09-24 · score 9.9
CVE-2026-81549
IBM DataStage on Cloud Pak for Data 5.4.0.0 could allow a remote authenticated attacker to obtain sensitive information due to improper validation of the X-Forwarded-Proto header.
2026-09-24 · score 9.6
CVE-2026-97360
HFS2 version 2.4.0 and earlier contains an unauthenticated arbitrary file access vulnerability that allows unauthenticated attackers to read, write, append, and delete files anywhere the HFS service account has filesystem access outside the shared folder. Attackers can exploit the macro dispatcher's lack of authorization model combined with the path resolver's failure to confine absolute paths to manipulate the template engine and compromise the confidentiality, integrity, and availability of the host.
2026-09-24 · score 10.0
CVE-2026-97359
HFS2 version 2.4.0 and earlier contains a template injection vulnerability in the multipart upload handler that allows unauthenticated attackers to achieve remote code execution by embedding malicious template syntax in a filename. Attackers can craft a filename containing a closing template quoting sequence followed by an exec macro, which bypasses the authorization check in the dispatcher to execute arbitrary commands on the underlying host system.
2026-09-24 · score 10.0