Overview
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.
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-ravpn-auth-8LyfCkeC; https://nvd.nist.gov/vuln/detail/CVE-2023-20269
Key Details
| Property | Value |
|---|---|
| CVE ID | CVE-2023-20269 |
| Vendor / Product | Cisco — Adaptive Security Appliance and Firepower Threat Defense |
| NVD Published | 2023-09-06 |
| NVD Last Modified | 2025-10-28 |
| CVSS 3.1 Score | 5 |
| CVSS 3.1 Vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N |
| Severity | MEDIUM |
| CWE | CWE-288 |
| CISA KEV Added | 2023-09-13 |
| CISA KEV Deadline | 2023-10-04 |
| Known Ransomware Use | ⚠️ Yes |
CVSS 3.1 Breakdown
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
None
Integrity
Low
Availability
None
Required Action
CISA BOD 22-01 Deadline: 2023-10-04.
Apply mitigations per vendor instructions for group-lock and vpn-simultaneous-logins or discontinue use of the product for unsupported devices.
Timeline
| Date | Event |
|---|---|
| 2023-09-13 | Added to CISA Known Exploited Vulnerabilities catalog |
| 2023-10-04 | CISA BOD 22-01 remediation deadline |
References
| Resource | Type |
|---|---|
| NVD — CVE-2023-20269 | Vulnerability Database |
| CISA KEV Catalog Entry | US Government |