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CVE-2023-20269: Cisco Adaptive Security Appliance and Firepower Threat Defense Unauthorized Access Vulnerability
Cisco Adaptive Security Appliance and Firepower Threat Defense · in CISA KEV since 2023-09-13
2023-09-13added to KEV
2023-10-04federal remediation due date
25.45%EPSS exploit probability (30 days) 97.9th percentile
9.1 CRITICALCVSS 3.1
Knownknown ransomware use
7days from NVD publication to KEV
What it is
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.
Required action (CISA)
Apply mitigations per vendor instructions for group-lock and vpn-simultaneous-logins or discontinue use of the product for unsupported devices.
| CWE | CWE-288 |
|---|---|
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
| NVD published | 2023-09-06 (Analyzed) |
Original records: NVD · CISA KEV · JSON: /api/cve/CVE-2023-20269.json · all KEV CVEs
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Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.
Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.