UpHeron
All vulnerabilities

Servers and applications

CVE-2021-1501

A vulnerability in the SIP inspection engine of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a crash and reload of an affected device, resulting in a denial of service (DoS) condition.The vulnerability is due to a crash that occurs during a hash lookup for a SIP pinhole connection. An…

Severity
High 7.5
Published
29 Apr 2021
Last changed
11 Aug 2026
Added to UpHeron
1 Nov 2026
Fixed in
9.8.4.34, 9.9.2.85, 9.12.4.18, 9.13.1.21, 9.14.2.13, 9.15.1.15
Sources
NVD

Affected software

SoftwareAffected versions
Cisco ASA and Firepower Threat DefenseServers and applications · cpe:o:cisco:adaptive_security_appliance_software
  • From 9.8 before 9.8.4.34
  • From 9.9 before 9.9.2.85
  • From 9.10 before 9.12.4.18
  • From 9.13 before 9.13.1.21
  • From 9.14 before 9.14.2.13
  • From 9.15 before 9.15.1.15

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2021-1501
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2021-1501