UpHeron
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Servers and applications

CVE-2020-3561

A vulnerability in the Clientless SSL VPN (WebVPN) of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to inject arbitrary HTTP headers in the responses of the affected system. The vulnerability is due to improper input sanitization. An attacker could exploit this vulnerability by persuading a user…

Severity
Medium 4.7
Published
21 Oct 2020
Last changed
11 Aug 2026
Added to UpHeron
1 Nov 2026
Fixed in
9.8.4.20, 9.9.2.80, 9.10.1.43, 9.12.3.9, 9.13.1.10, 9.14.1.10
Sources
NVD

Affected software

SoftwareAffected versions
Cisco ASA and Firepower Threat DefenseServers and applications · cpe:a:cisco:adaptive_security_appliance
  • Every version before 9.6.4.35
Cisco ASA and Firepower Threat DefenseServers and applications · cpe:o:cisco:adaptive_security_appliance_software
  • From 9.8.0 before 9.8.4.20
  • From 9.9.0 before 9.9.2.80
  • From 9.10.0 before 9.10.1.43
  • From 9.12.0 before 9.12.3.9
  • From 9.13.0 before 9.13.1.10
  • From 9.14.0 before 9.14.1.10

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2020-3561
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2020-3561