{"cveID":"CVE-2025-21391","vendorProject":"Microsoft","product":"Windows","vulnerabilityName":"Microsoft Windows Storage Link Following Vulnerability","dateAdded":"2025-02-11","shortDescription":"Microsoft Windows Storage contains a link following vulnerability that could allow for privilege escalation. This vulnerability could allow an attacker to delete data including data that results in the service being unavailable.","requiredAction":"Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","dueDate":"2025-03-04","knownRansomwareCampaignUse":"Unknown","notes":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21391 ; https://nvd.nist.gov/vuln/detail/CVE-2025-21391","cwes":["CWE-59"],"year":2025,"state":"mapped","stale_reasons":[],"mappings":[{"domain":"enterprise","cve":"CVE-2025-21391","technique":"T1068","technique_name_at_mapping":"Exploitation for Privilege Escalation","mapping_type":"exploitation_technique","capability_group":"priv_escalation","comments":"Exploiting this link-following vulnerability can lead to privilege escalation, with the primary result being deletion of system data. As a consequence of this, deletion of certain files could also make the recovery process more difficult.","references":["https://silentbreach.com/BlogArticles/cve-2025-21391-elevation-of-privilege-in-windows-storage/"],"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-2025-21391","technique":"T1485","technique_name_at_mapping":"Data Destruction","mapping_type":"primary_impact","capability_group":"priv_escalation","comments":"Exploiting this link-following vulnerability can lead to privilege escalation, with the primary result being deletion of system data. As a consequence of this, deletion of certain files could also make the recovery process more difficult.","references":["https://silentbreach.com/BlogArticles/cve-2025-21391-elevation-of-privilege-in-windows-storage/"],"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-2025-21391","technique":"T1490","technique_name_at_mapping":"Inhibit System Recovery","mapping_type":"primary_impact","capability_group":"priv_escalation","comments":"Exploiting this link-following vulnerability can lead to privilege escalation, with the primary result being deletion of system data. As a consequence of this, deletion of certain files could also make the recovery process more difficult.","references":["https://silentbreach.com/BlogArticles/cve-2025-21391-elevation-of-privilege-in-windows-storage/"],"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":["exploitation_technique"],"sigma_rule_count":31,"has_detection_strategy":true},{"id":"T1485","domains":["enterprise"],"in_current_bundle":true,"live":true,"name_now":"Data Destruction","name_at_mapping":"Data Destruction","renamed":false,"revoked_by":null,"mapping_types":["primary_impact"],"sigma_rule_count":20,"has_detection_strategy":true},{"id":"T1490","domains":["enterprise"],"in_current_bundle":true,"live":true,"name_now":"Inhibit System Recovery","name_at_mapping":"Inhibit System Recovery","renamed":false,"revoked_by":null,"mapping_types":["primary_impact"],"sigma_rule_count":27,"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":[],"added_after_mapping_snapshot":false,"_source":"kevmap","_built":"2026-08-24 19:45 UTC","_attack_version":"19.2"}