{"cveID":"CVE-2021-36934","vendorProject":"Microsoft","product":"Windows","vulnerabilityName":"Microsoft Windows SAM Local Privilege Escalation Vulnerability","dateAdded":"2022-02-10","shortDescription":"If a Volume Shadow Copy (VSS) shadow copy of the system drive is available, users can read the SAM file which would allow any user to escalate privileges to SYSTEM level.","requiredAction":"Apply updates per vendor instructions.","dueDate":"2022-02-24","knownRansomwareCampaignUse":"Unknown","notes":"https://nvd.nist.gov/vuln/detail/CVE-2021-36934","cwes":["CWE-1220"],"year":2021,"state":"mapped","stale_reasons":[],"mappings":[{"domain":"enterprise","cve":"CVE-2021-36934","technique":"T1078","technique_name_at_mapping":"Valid Accounts","mapping_type":"exploitation_technique","capability_group":"priv_escalation","comments":"This vulnerability is exploited by a local or remote adversary who already has access to the system. The vulnerability enables the attacker to elevate their privileges due to over permissive ACLs on system file and elevate their privileges to SYSTEM level. By exploiting this vulnerability an attacker could gain the ability to run arbitrary code, install programs, view/modify/delete data, or create new user accounts with full rights. ","references":["https://www.sentinelone.com/blog/hivenightmare-protecting-windows-10-security-account-manager-against-cve-2021-36934/"],"status":"complete","source_file":"kev-07.28.2025_attack-16.1-enterprise.json","attack_version":"16.1","kev_snapshot":"07/28/2025"},{"domain":"enterprise","cve":"CVE-2021-36934","technique":"T1068","technique_name_at_mapping":"Exploitation for Privilege Escalation","mapping_type":"primary_impact","capability_group":"priv_escalation","comments":"This vulnerability is exploited by a local or remote adversary who already has access to the system. The vulnerability enables the attacker to elevate their privileges due to over permissive ACLs on system file and elevate their privileges to SYSTEM level. By exploiting this vulnerability an attacker could gain the ability to run arbitrary code, install programs, view/modify/delete data, or create new user accounts with full rights. ","references":["https://www.sentinelone.com/blog/hivenightmare-protecting-windows-10-security-account-manager-against-cve-2021-36934/"],"status":"complete","source_file":"kev-07.28.2025_attack-16.1-enterprise.json","attack_version":"16.1","kev_snapshot":"07/28/2025"}],"techniques":[{"id":"T1068","domains":["enterprise"],"in_current_bundle":true,"live":true,"name_now":"Exploitation for Privilege Escalation","name_at_mapping":"Exploitation for Privilege Escalation","renamed":false,"revoked_by":null,"mapping_types":["primary_impact"],"sigma_rule_count":31,"has_detection_strategy":true},{"id":"T1078","domains":["enterprise"],"in_current_bundle":true,"live":true,"name_now":"Valid Accounts","name_at_mapping":"Valid Accounts","renamed":false,"revoked_by":null,"mapping_types":["exploitation_technique"],"sigma_rule_count":56,"has_detection_strategy":true}],"mapping_types":["exploitation_technique","primary_impact"],"has_exploitation_technique":true,"mapping_attack_versions":["16.1"],"mapping_domains":["enterprise"],"sigma_coverage":"full","sigma_rules_tagged_cve":["6ea858a8-ba71-4a12-b2cc-5d83312404c7"],"added_after_mapping_snapshot":false,"_source":"kevmap","_built":"2026-08-23 05:47 UTC","_attack_version":"19.2"}