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Servers and applications

CVE-2018-15388

A vulnerability in the WebVPN login process of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause increased CPU utilization on an affected device. The vulnerability is due to excessive processing load for existing WebVPN login operations. An attacker could exploit this vulnerability by…

Severity
High 8.6
Published
3 May 2019
Last changed
11 Aug 2026
Added to UpHeron
1 Nov 2026
Fixed in
9.6.4.25, 9.8.4, 9.9.2.50
Exploit chance
2% in the next 30 daysHigher than 80% of CVEs. EPSS by FIRST, 10 Nov 2026
Sources
NVD

Affected software

SoftwareAffected versions
Cisco ASA and Firepower Threat DefenseServers and applications · cpe:o:cisco:adaptive_security_appliance_software
  • From 9.5 before 9.6.4.25
  • From 9.7 before 9.8.4
  • From 9.9 before 9.9.2.50

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2018-15388
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2018-15388