{"cveID":"CVE-2021-27059","vendorProject":"Microsoft","product":"Office","vulnerabilityName":"Microsoft Office Remote Code Execution Vulnerability","dateAdded":"2021-11-03","shortDescription":"Microsoft Office contains an unspecified vulnerability that allows for remote code execution.","requiredAction":"Apply updates per vendor instructions.","dueDate":"2021-11-17","knownRansomwareCampaignUse":"Unknown","notes":"https://nvd.nist.gov/vuln/detail/CVE-2021-27059","cwes":[],"year":2021,"state":"mapped","stale_reasons":[],"mappings":[{"domain":"enterprise","cve":"CVE-2021-27059","technique":"T1203","technique_name_at_mapping":"Exploitation for Client Execution","mapping_type":"exploitation_technique","capability_group":"code_execution","comments":"The vulnerability allows a remote user to execute arbitrary code on the target system due to improper input validation in Microsoft Office.","references":["https://www.cybersecurity-help.cz/vdb/SB2021030942"],"status":"complete","source_file":"kev-07.28.2025_attack-16.1-enterprise.json","attack_version":"16.1","kev_snapshot":"07/28/2025"}],"techniques":[{"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}],"mapping_types":["exploitation_technique"],"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"}