{"cveID":"CVE-2023-23397","vendorProject":"Microsoft","product":"Office","vulnerabilityName":"Microsoft Office Outlook Privilege Escalation Vulnerability","dateAdded":"2023-03-14","shortDescription":"Microsoft Office Outlook contains a privilege escalation vulnerability that allows for a NTLM Relay attack against another service to authenticate as the user.","requiredAction":"Apply updates per vendor instructions.","dueDate":"2023-04-04","knownRansomwareCampaignUse":"Unknown","notes":"https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2023-23397, https://msrc.microsoft.com/blog/2023/03/microsoft-mitigates-outlook-elevation-of-privilege-vulnerability/, ;  https://nvd.nist.gov/vuln/detail/CVE-2023-23397","cwes":["CWE-294"],"year":2023,"state":"mapped","stale_reasons":[],"mappings":[{"domain":"enterprise","cve":"CVE-2023-23397","technique":"T1203","technique_name_at_mapping":"Exploitation for Client Execution","mapping_type":"exploitation_technique","capability_group":"priv_escalation","comments":"This vulnerability is exploited when an adversary sends a specially-crafted email which can result in the disclosure of authentication information that an adversary can replay to gain access to systems.","references":["https://www.microsoft.com/en-us/security/blog/2023/03/24/guidance-for-investigating-attacks-using-cve-2023-23397/","https://unit42.paloaltonetworks.com/threat-brief-cve-2023-23397/","https://msrc.microsoft.com/blog/2023/03/microsoft-mitigates-outlook-elevation-of-privilege-vulnerability/"],"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-2023-23397","technique":"T1078","technique_name_at_mapping":"Valid Accounts","mapping_type":"secondary_impact","capability_group":"priv_escalation","comments":"This vulnerability is exploited when an adversary sends a specially-crafted email which can result in the disclosure of authentication information that an adversary can replay to gain access to systems.","references":["https://www.microsoft.com/en-us/security/blog/2023/03/24/guidance-for-investigating-attacks-using-cve-2023-23397/","https://unit42.paloaltonetworks.com/threat-brief-cve-2023-23397/","https://msrc.microsoft.com/blog/2023/03/microsoft-mitigates-outlook-elevation-of-privilege-vulnerability/"],"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-2023-23397","technique":"T1550.002","technique_name_at_mapping":"Pass the Hash","mapping_type":"primary_impact","capability_group":"priv_escalation","comments":"This vulnerability is exploited when an adversary sends a specially-crafted email which can result in the disclosure of authentication information that an adversary can replay to gain access to systems.","references":["https://www.microsoft.com/en-us/security/blog/2023/03/24/guidance-for-investigating-attacks-using-cve-2023-23397/","https://unit42.paloaltonetworks.com/threat-brief-cve-2023-23397/","https://msrc.microsoft.com/blog/2023/03/microsoft-mitigates-outlook-elevation-of-privilege-vulnerability/"],"status":"complete","source_file":"kev-07.28.2025_attack-16.1-enterprise.json","attack_version":"16.1","kev_snapshot":"07/28/2025"}],"techniques":[{"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":["secondary_impact"],"sigma_rule_count":56,"has_detection_strategy":true},{"id":"T1203","domains":["enterprise"],"in_current_bundle":true,"live":true,"name_now":"Exploitation for Client Execution","name_at_mapping":"Exploitation for Client Execution","renamed":false,"revoked_by":null,"mapping_types":["exploitation_technique"],"sigma_rule_count":35,"has_detection_strategy":true},{"id":"T1550.002","domains":["enterprise"],"in_current_bundle":true,"live":true,"name_now":"Pass the Hash","name_at_mapping":"Pass the Hash","renamed":false,"revoked_by":null,"mapping_types":["primary_impact"],"sigma_rule_count":6,"has_detection_strategy":true}],"mapping_types":["exploitation_technique","primary_impact","secondary_impact"],"has_exploitation_technique":true,"mapping_attack_versions":["16.1"],"mapping_domains":["enterprise"],"sigma_coverage":"full","sigma_rules_tagged_cve":["73c59189-6a6d-4b9f-a748-8f6f9bbed75c","982e9f2d-1a85-4d5b-aea4-31f5e97c6555","de96b824-02b0-4241-9356-7e9b47f04bac","fc06e655-d98c-412f-ac76-05c2698b1cb2"],"added_after_mapping_snapshot":false,"_source":"kevmap","_built":"2026-08-23 05:47 UTC","_attack_version":"19.2"}