Cisco Adaptive Security Appliance and Firepower Threat Defense Unauthorized Access Vulnerability (CVE-2023-20269)
Severity: critical · Patch status: unknown · Since 2023-09-13 · CVE-2023-20269
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. CISA added CVE-2023-20269 to its Known Exploited Vulnerabilities catalog on Sep 13, 2023, which means attackers are exploiting it in the wild. CISA reports known use in ransomware campaigns.
What to do
- Apply mitigations per vendor instructions for group-lock and vpn-simultaneous-logins or discontinue use of the product for unsupported devices.
- US federal agencies must remediate by Oct 4, 2023 (BOD 22-01); treat that as the outer limit.
Sources
All live incidents on Threat Watch
