CVE-2023-20269
Cisco Adaptive Security Appliance and Firepower Threat Defense Unauthorized Access Vulnerability
IN CISA KEV
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.
- Vendor
- Cisco
- Product
- Adaptive Security Appliance and Firepower Threat Defense
- CVSS
- No score recorded (no NVD record loaded for this entry)
- CWE
- CWE-288
- Published
- Not recorded
- NVD modified
- Not recorded
CISA KEV
- Date added
- 2023-09-13
- Due date
- 2023-10-04
- Ransomware use
- Known
- Required action
- Apply mitigations per vendor instructions for group-lock and vpn-simultaneous-logins or discontinue use of the product for unsupported devices.
EPSS
25.5% chance of exploitation in the next 30 days (percentile 97th)
FIRST EPSS, updated 17 Oct 2026. About EPSS
CVSS is severity, EPSS is likelihood, KEV means already exploited. EPSS is a statistical probability, not a certainty: a low score does not make a bug safe, and a high one does not prove it is being exploited.
Data last updated 18 Oct 2026. Sources: NVD API 2.0, CISA KEV catalog, FIRST EPSS. Links: NVD, CISA KEV. Metadata only. ThreatWire does not host exploit code.