{"cveID":"CVE-2023-20269","vendorProject":"Cisco","product":"Adaptive Security Appliance and Firepower Threat Defense","vulnerabilityName":"Cisco Adaptive Security Appliance and Firepower Threat Defense Unauthorized Access Vulnerability","dateAdded":"2023-09-13","shortDescription":"Cisco Adaptive Security Appliance and Firepower Threat Defense contain an unauthorized access vulnerability that could allow an unauthenticated, remote attacker to conduct a brute force attack in an attempt to identify valid username and password combinations or establish a clientless SSL VPN session with an unauthorized user.","requiredAction":"Apply mitigations per vendor instructions for group-lock and vpn-simultaneous-logins or discontinue use of the product for unsupported devices.","dueDate":"2023-10-04","knownRansomwareCampaignUse":"Known","notes":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-ravpn-auth-8LyfCkeC;  https://nvd.nist.gov/vuln/detail/CVE-2023-20269","cwes":["CWE-288"],"year":2023,"state":"mapped","stale_reasons":[],"mappings":[{"domain":"enterprise","cve":"CVE-2023-20269","technique":"T1133","technique_name_at_mapping":"External Remote Services","mapping_type":"exploitation_technique","capability_group":"priv_mgmt","comments":"This vulnerability is exploited by an unauthenticated, remote attacker by specifying a default connection profile/tunnel group, enabling a brute-force attack to identify valid credentials and establish a clienteles SSL VPN session using  those valid credentials.","references":["https://www.kroll.com/en/insights/publications/cyber/akira-ransomware-deep-dive","https://blogs.cisco.com/security/akira-ransomware-targeting-vpns-without-multi-factor-authentication","https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-ravpn-auth-8LyfCkeC"],"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-2023-20269","technique":"T1078","technique_name_at_mapping":"Valid Accounts","mapping_type":"primary_impact","capability_group":"priv_mgmt","comments":"This vulnerability is exploited by an unauthenticated, remote attacker by specifying a default connection profile/tunnel group, enabling a brute-force attack to identify valid credentials and establish a clienteles SSL VPN session using those valid credentials.","references":["https://www.kroll.com/en/insights/publications/cyber/akira-ransomware-deep-dive","https://blogs.cisco.com/security/akira-ransomware-targeting-vpns-without-multi-factor-authentication","https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-ravpn-auth-8LyfCkeC"],"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":["primary_impact"],"sigma_rule_count":56,"has_detection_strategy":true},{"id":"T1133","domains":["enterprise"],"in_current_bundle":true,"live":true,"name_now":"External Remote Services","name_at_mapping":"External Remote Services","renamed":false,"revoked_by":null,"mapping_types":["exploitation_technique"],"sigma_rule_count":20,"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":"2026-08-23 05:47 UTC","_attack_version":"19.2"}