Summary
generated automatically from NVD dataCisco Secure Firewall ASA Software and Secure Firewall Threat Defense (FTD) Software contain a flaw in the Remote Access SSL VPN service, caused by logic errors when secondary authentication is configured on a tunnel group. An unauthenticated remote attacker can send a crafted request while connecting to the SSL remote access VPN, forcing the device to reload unexpectedly and causing a denial of service. The issue is rated CVSS 8.6 (HIGH) and is listed in the CISA KEV catalog, which indicates active exploitation.
NVD description
A vulnerability in the Remote Access SSL VPN service of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the device to reload unexpectedly, resulting in a denial of service (DoS) condition. This vulnerability is due to logic errors when secondary authentication is configured on a tunnel group. An attacker could exploit this vulnerability by sending a crafted request when connecting to the SSL remote access VPN. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition.
⚠️ Actively exploited — CISA KEV
This CVE was added to CISA's Known Exploited Vulnerabilities catalog on 2026-10-29. It is confirmed exploited in the wild and must be patched as a priority.
Remediation deadline (US federal agencies): 2026-11-01
EPSS · FIRST.org
0.57%probability of exploitation in the next 30 days
Higher than 47% of scored CVEs
EPSS (Exploit Prediction Scoring System) estimates, from observed exploitation activity, how likely a CVE is to be exploited in the next 30 days. It complements CVSS, which measures severity, not likelihood. Score of 2026-10-29, recomputed daily by FIRST.org.
In-depth analysis on cveo.tech
This CVE is covered in an article: context, affected versions and published fixes.
CVSS v3.1 Score
Information
- Published
- 28 oct. 2026
- Updated
- 30 oct. 2026
- Status
- Undergoing Analysis
- Source
- psirt@cisco.com
Weaknesses (CWE)
Similar CVEs
Other vulnerabilities of type CWE-690
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