CVE•Published 2021-05-26•Modified 2026-08-12•1 article on news•6 live references•NVD data
CVE-2021-21985Vmware · Vcenter_server
Vulnerability data via NVD (ingested)
CVSS v3.1
9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
100
Exploit Prediction Scoring System · top 0% of all CVEs
Weaknesses (CWE)
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.
Timeline
Published 2021-05-26
Modified 2026-08-12
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2021-21985Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product + version
product:"Vmware Vcenter Server" version:"6.5"Version-pinned fingerprint from NVD's first vulnerable CPE.
Shodan · banner/body mention
http.html:"Vcenter Server"HTTP body or banner mentions "Vcenter Server" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2021-21985Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2021-21985Censys host search filtered to this CVE id.
grep.app
CVE-2021-21985Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2021-21985GitHub code search for direct mentions.
Google dork
"CVE-2021-21985" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub (7)
CVE-2021-219857 repos
guchangan1/All-Defense-ToolPython
本项目集成了全网优秀的攻防武器工具项目，包含自动化利用，子域名、目录扫描、端口扫描等信息收集工具，各大中间件、cms、OA漏洞利用工具，爆破工具、内网横向、免杀、社工钓鱼以及应急响应、甲方安全资料等其他安全攻防资料。
Mr-xn/Penetration_Testing_POCHTML
渗透测试有关的POC、EXP、脚本、提权、小工具等---About penetration-testing python-script poc getshell csrf xss cms php-getshell domainmod-xss csrf-webshell cobub-razor cve rce sql sql-poc poc-exp bypas…
taielab/awesome-hacking-listsunknown
A curated collection of top-tier penetration testing tools and productivity utilities across multiple domains. Join us to explore, contribute, and enhance your hacking toolkit!
SexyBeast233/SecBooksHTML
安全类各家文库大乱斗
W01fh4cker/VcenterKitPython
Vcenter综合渗透利用工具包 | Vcenter Comprehensive Penetration and Exploitation Toolkit
Spacial/awesome-csirtC
Awesome CSIRT is an curated list of links and resources in security and CSIRT daily activities.
Ostorlab/KEVunknown
Ostorlab KEV: One-command to detect most remotely known exploitable vulnerabilities. Sourced from CISA KEV, Google's Tsunami, Ostorlab's Asteroid and Bug Bounty programs.