CVE-2023-20269
Actively exploited. CVE-2023-20269 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2023-09-13) — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.
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.
CSIRTS triage
- What
- An unauthorized access vulnerability allows an unauthenticated remote attacker to conduct brute force attacks.
- Who is affected
- Deployments of Cisco Adaptive Security Appliance and Firepower Threat Defense.
- Urgency
- Remediation is urgent due to active exploitation and critical severity.
- Action
- Apply the latest security patches provided by Cisco.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Exploitation confirmedAlready exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 97% of all EPSS-scored CVEs.
Advisory coverage (1)
- criticalexploitedCVE-2023-20269: Cisco Adaptive Security Appliance and Firepower Threat Defense Unauthorized Access Vulnerabili…cisa-kev · 2023-09-13
External references
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