{"id":"CVE-2021-1498","published":"2021-05-06T13:15:10Z","modified":"2026-06-17T03:31:54Z","title":"Cisco HyperFlex HX Data Platform Command Injection Vulnerability","vendor":"Cisco","product":"HyperFlex HX","tier":"core","eol":null,"description":{"text":"Multiple vulnerabilities in the web-based management interface of Cisco HyperFlex HX could allow an unauthenticated, remote attacker to perform command injection attacks against an affected device. For more information about these vulnerabilities, see the Details section of this advisory.","provenance":"source","from":"NVD"},"summary":{"text":"Multiple command injection flaws exist in the web-based management interface of Cisco HyperFlex HX, a Cisco HyperFlex HX Data Platform product. An unauthenticated attacker with network access to that interface can send crafted requests to inject operating system commands into the affected device, with no user interaction required.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-29T13:44:44Z"},"cvss":{"score":9.8,"severity":"CRITICAL","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","provenance":"source","from":"NVD"},"epss":{"score":0.99999,"percentile":0.99991,"date":"2026-10-29","provenance":"source"},"kev":{"dateAdded":"2021-11-03","dueDate":"2021-11-17","ransomware":false,"requiredAction":"Apply updates per vendor instructions.","notes":"https://nvd.nist.gov/vuln/detail/CVE-2021-1498","provenance":"source"},"vulncheckKev":{"dateAdded":"2021-06-24","exploitedFirstSeen":"2021-06-24","ransomware":false,"evidence":[{"url":"https://www.fortinet.com/blog/threat-research/the-ghosts-of-mirai","date":"2021-06-24"},{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2021-11-03"},{"url":"https://info.greynoise.io/hubfs/resources/GreyNoise-Early-Warning-Signals-Attacker-Behavior-Precedes-New-Vulnerabilities-Report.pdf","date":"2025-07-31"},{"url":"https://www.greynoise.io/blog/scanning-surge-cisco-asa-devices","date":"2025-09-04"},{"url":"https://www.hkcert.org/security-bulletin/multiple-vulnerabilities-in-internet-facing-systems-targeting-hong-kong-s-education-sector_20260724","date":"2026-07-24"}],"evidenceTotal":5,"provenance":"source"},"exploited":true,"otx":{"pulseCount":50,"pulses":[{"name":"Actively_Exploited_Kev | Oct 29, 2026","url":"https://otx.alienvault.com/pulse/6ae20c1db17e7057ae7d9ad1","created":"2026-10-28"},{"name":"Actively_Exploited_Kev | Oct 28, 2026","url":"https://otx.alienvault.com/pulse/6ae0ba7e0e2a97ff7b218819","created":"2026-10-27"},{"name":"Actively_Exploited_Kev | Oct 27, 2026","url":"https://otx.alienvault.com/pulse/6adf68b85c3e852f3c111d18","created":"2026-10-26"},{"name":"Actively_Exploited_Kev | Oct 24, 2026","url":"https://otx.alienvault.com/pulse/6adb740e397c3ad4799aa4cd","created":"2026-10-23"},{"name":"Actively_Exploited_Kev | Oct 23, 2026","url":"https://otx.alienvault.com/pulse/6ada236fcfba2dfa730ea482","created":"2026-10-22"},{"name":"Actively_Exploited_Kev | Oct 22, 2026","url":"https://otx.alienvault.com/pulse/6ad8d33a077cbb5cab524d80","created":"2026-10-21"},{"name":"Actively_Exploited_Kev | Oct 21, 2026","url":"https://otx.alienvault.com/pulse/6ad78130c4d1ac2be83a8b6d","created":"2026-10-20"},{"name":"Actively_Exploited_Kev | Oct 20, 2026","url":"https://otx.alienvault.com/pulse/6ad62f63c24a405a3423cc13","created":"2026-10-19"},{"name":"Actively_Exploited_Kev | Oct 19, 2026","url":"https://otx.alienvault.com/pulse/6ad4dda174e5797d0bd238b7","created":"2026-10-18"},{"name":"Actively_Exploited_Kev | Oct 18, 2026","url":"https://otx.alienvault.com/pulse/6ad38c22e1848f8189d1c121","created":"2026-10-17"}],"provenance":"machine"},"cwes":[{"id":"CWE-77","name":"Improper Neutralization of Special Elements used in a Command"},{"id":"CWE-78","name":"Improper Neutralization of Special Elements used in an OS Command"}],"references":[{"url":"http://packetstormsecurity.com/files/162976/Cisco-HyperFlex-HX-Data-Platform-Command-Execution.html","tags":["Exploit","Third Party Advisory","VDB Entry"]},{"url":"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hyperflex-rce-TjjNrkpR","tags":["Vendor Advisory"]},{"url":"http://packetstormsecurity.com/files/162976/Cisco-HyperFlex-HX-Data-Platform-Command-Execution.html","tags":["Exploit","Third Party Advisory","VDB Entry"]},{"url":"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hyperflex-rce-TjjNrkpR","tags":["Vendor Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-1498","tags":["US Government Resource"]}],"techniques":[{"id":"T1133","name":"External Remote Services","tactics":["initial-access","persistence"],"provenance":"source","basis":"ctid-kev","bases":["ctid-kev"],"basisDetail":"CTID Mappings Explorer KEV 07/28/2025 (ATT&CK 16.1); capability: Command Injection","mappingType":"exploitation_technique","evidence":[],"comment":"CVE-2021-1498 is a critical vulnerability in the web-based management interface of Cisco HyperFlex HX Data Platform. This vulnerability allows an unauthenticated, remote attacker to perform a command injection attack against an affected device","confidence":"high"},{"id":"T1059","name":"Command and Scripting Interpreter","tactics":["execution"],"provenance":"source","basis":"ctid-kev","bases":["ctid-kev"],"basisDetail":"CTID Mappings Explorer KEV 07/28/2025 (ATT&CK 16.1); capability: Command Injection","mappingType":"primary_impact","evidence":[],"comment":"CVE-2021-1498 is a critical vulnerability in the web-based management interface of Cisco HyperFlex HX Data Platform. This vulnerability allows an unauthenticated, remote attacker to perform a command injection attack against an affected device","confidence":"high"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2021-6965","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2021-6965","exploited":true,"exploitedSince":"2021-11-03","provenance":"source"},"exploits":[],"exploitSources":{"metasploit":[{"name":"Cisco HyperFlex HX Data Platform Command Execution","module":"exploit/linux/http/cisco_hyperflex_hx_data_platform_cmd_exec","type":"exploit","disclosureDate":"2021-05-05","url":"https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/http/cisco_hyperflex_hx_data_platform_cmd_exec.rb"}],"nuclei":[{"id":"CVE-2021-1498","name":"Cisco HyperFlex HX Data Platform - Remote Command Execution","severity":"critical","path":"http/cves/2021/CVE-2021-1498.yaml","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-1498.yaml"}],"first":{"date":"2021-05-05","source":"Metasploit","url":"https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/http/cisco_hyperflex_hx_data_platform_cmd_exec.rb"},"provenance":"source"},"exploitRefs":["http://packetstormsecurity.com/files/162976/Cisco-HyperFlex-HX-Data-Platform-Command-Execution.html"],"flow":[{"stage":"exploitation","techniques":["T1133"],"provenance":"source"},{"stage":"primary","techniques":["T1059"],"provenance":"source"}],"timeline":[{"date":"2021-05-05","kind":"exploit-public","label":"First public exploit: Metasploit","url":"https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/http/cisco_hyperflex_hx_data_platform_cmd_exec.rb","provenance":"source"},{"date":"2021-05-06","kind":"published","label":"Published (NVD)","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-1498","provenance":"source"},{"date":"2021-06-24","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV evidence)","url":"https://www.fortinet.com/blog/threat-research/the-ghosts-of-mirai","provenance":"source"},{"date":"2021-11-03","kind":"kev","label":"Added to CISA KEV","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","provenance":"source"},{"date":"2021-11-03","kind":"euvd-exploited","label":"ENISA EUVD: exploited","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2021-6965","provenance":"source"}],"speed":{"daysToPublicExploit":null,"firstExploitFrom":"Metasploit","daysToKev":181},"priority":{"score":69.9,"factors":[{"name":"In a KEV catalog","points":35.0,"detail":"listed in CISA KEV and VulnCheck KEV"},{"name":"Recent KEV listing","points":0.0,"detail":"added 1953 days ago"},{"name":"Known ransomware use","points":0.0,"detail":"not known"},{"name":"EPSS percentile","points":20.0,"detail":"percentile 0.9999"},{"name":"Named in threat reports","points":0.0,"detail":"0 reports"},{"name":"Public exploit code","points":5.0,"detail":"1 NVD reference tagged Exploit; 1 Metasploit module; 1 nuclei template"},{"name":"Mentioned in OTX pulses","points":3.0,"detail":"50 pulses"},{"name":"CVSS severity","points":6.86,"detail":"base score 9.8"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]}}