{"id":"CVE-2022-21971","published":"2022-02-09T17:15:08Z","modified":"2026-06-17T04:27:22Z","title":"Microsoft Windows Runtime Remote Code Execution Vulnerability","vendor":"Microsoft","product":"Windows","tier":"core","eol":null,"description":{"text":"Windows Runtime Remote Code Execution Vulnerability","provenance":"source","from":"NVD"},"summary":null,"cvss":{"score":7.8,"severity":"HIGH","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","provenance":"source","from":"NVD"},"epss":{"score":0.53781,"percentile":0.98995,"date":"2026-10-29","provenance":"source"},"kev":{"dateAdded":"2022-08-18","dueDate":"2022-09-08","ransomware":false,"requiredAction":"Apply updates per vendor instructions.","notes":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-21971;  https://nvd.nist.gov/vuln/detail/CVE-2022-21971","provenance":"source"},"vulncheckKev":{"dateAdded":"2022-08-18","exploitedFirstSeen":"2022-08-18","ransomware":false,"evidence":[{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2022-08-18"}],"evidenceTotal":1,"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-824","name":"Access of Uninitialized Pointer"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-21971","tags":["Patch","Vendor Advisory"]},{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-21971","tags":["Patch","Vendor Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-21971","tags":["US Government Resource"]}],"techniques":[{"id":"T1204.001","name":"Malicious Link","tactics":["execution"],"provenance":"source","basis":"ctid-kev","bases":["ctid-kev"],"basisDetail":"CTID Mappings Explorer KEV 07/28/2025 (ATT&CK 16.1); capability: Code Execution","mappingType":"exploitation_technique","evidence":[],"comment":"This vulnerability is exploited when an authenticated user is convinced by an attacker to download and open a specially crafted file from a website, which grants the attacker access to the victim's computer. No articles have been released to the public showing that this vulnerability has been executed in the wild or provides any information on how an exploitation is carried out. ","confidence":"medium","confidenceNote":"CTID KEV capability group \"code execution\" is generic"},{"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: Code Execution","mappingType":"primary_impact","evidence":[],"comment":"This vulnerability is exploited when an authenticated user is convinced by an attacker to download and open a specially crafted file from a website, which grants the attacker access to the victim's computer. No articles have been released to the public showing that this vulnerability has been executed in the wild or provides any information on how an exploitation is carried out. ","confidence":"medium","confidenceNote":"CTID KEV capability group \"code execution\" is generic"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2022-27126","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2022-27126","exploited":true,"exploitedSince":"2022-08-18","provenance":"source"},"exploits":[],"exploitSources":{"pocGithub":{"count":3,"skipped":0,"earliest":"2022-02-26","earliestUrl":"https://github.com/0vercl0k/CVE-2022-21971","repos":[{"name":"0vercl0k/CVE-2022-21971","url":"https://github.com/0vercl0k/CVE-2022-21971","stars":302,"created":"2022-02-26"},{"name":"Malwareman007/CVE-2022-21971","url":"https://github.com/Malwareman007/CVE-2022-21971","stars":11,"created":"2022-10-07"},{"name":"tufanturhan/CVE-2022-21971-Windows-Runtime-RCE","url":"https://github.com/tufanturhan/CVE-2022-21971-Windows-Runtime-RCE","stars":2,"created":"2022-04-15"}]},"first":{"date":"2022-02-26","source":"PoC-in-GitHub","url":"https://github.com/0vercl0k/CVE-2022-21971"},"provenance":"source"},"exploitRefs":[],"flow":[{"stage":"exploitation","techniques":["T1204.001"],"provenance":"source"},{"stage":"primary","techniques":["T1059"],"provenance":"source"}],"timeline":[{"date":"2022-02-09","kind":"published","label":"Published (NVD)","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-21971","provenance":"source"},{"date":"2022-02-26","kind":"exploit-public","label":"First public exploit: PoC-in-GitHub","url":"https://github.com/0vercl0k/CVE-2022-21971","provenance":"source"},{"date":"2022-08-18","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV evidence)","url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","provenance":"source"},{"date":"2022-08-18","kind":"kev","label":"Added to CISA KEV","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","provenance":"source"},{"date":"2022-08-18","kind":"euvd-exploited","label":"ENISA EUVD: exploited","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2022-27126","provenance":"source"}],"speed":{"daysToPublicExploit":17,"firstExploitFrom":"PoC-in-GitHub","daysToKev":190},"priority":{"score":68.3,"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 1533 days ago"},{"name":"Known ransomware use","points":0.0,"detail":"not known"},{"name":"EPSS percentile","points":19.8,"detail":"percentile 0.9899"},{"name":"Named in threat reports","points":0.0,"detail":"0 reports"},{"name":"Public exploit code","points":5.0,"detail":"3 PoC-in-GitHub repos"},{"name":"Mentioned in OTX pulses","points":3.0,"detail":"50 pulses"},{"name":"CVSS severity","points":5.46,"detail":"base score 7.8"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]}}