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CVE-2016-6432

A vulnerability in the Identity Firewall feature of Cisco ASA Software before 9.6(2.1) could allow an unauthenticated, remote attacker to cause a reload of the affected system or to remotely execute code. The vulnerability is due to a buffer overflow in the affected code area. An attacker could exploit this vulnerability by sending a crafted NetBIOS packet in response to a NetBIOS probe sent by…

Severity
High 8.1
Published
27 Oct 2016
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
6.7% in the next 30 daysHigher than 93% of CVEs. EPSS by FIRST, 11 Nov 2026
Weakness
Memory buffer errors (CWE-119)
Attack
Over the network · Only under certain conditions · No login needed · No user action needed
Attacker can
Read data · Change data · Take it down
CVSS vector
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Sources
NVD

Description

A vulnerability in the Identity Firewall feature of Cisco ASA Software before 9.6(2.1) could allow an unauthenticated, remote attacker to cause a reload of the affected system or to remotely execute code. The vulnerability is due to a buffer overflow in the affected code area. An attacker could exploit this vulnerability by sending a crafted NetBIOS packet in response to a NetBIOS probe sent by the ASA software. An exploit could allow the attacker to execute arbitrary code and obtain full control of the system or cause a reload of the affected system. Note: Only traffic directed to the affected system can be used to exploit this vulnerability. This vulnerability affects systems configured in routed and transparent firewall mode and in single or multiple context mode. This vulnerability can be triggered by IPv4 traffic.

From NVD.

Affected software

SoftwareAffected versions
Cisco ASA and Firepower Threat DefenseServers and applications · cpe:o:cisco:adaptive_security_appliance_software
  • Version 9.6.1
  • Version 9.6.0
  • Version 9.5.2
  • Version 9.5.1
All 130 release lines
  • Version 8.4.0
  • Version 8.4.2
  • Version 8.4.2.1
  • Version 8.4.2.8
  • Version 8.4.3
  • Version 8.4.3.8
  • Version 8.4.3.9
  • Version 8.4.4
  • Version 8.4.4.1
  • Version 8.4.4.3
  • Version 8.4.4.5
  • Version 8.4.4.9
  • Version 8.4.5
  • Version 8.4.5.6
  • Version 8.4.6
  • Version 8.4.7
  • Version 8.4.7.3
  • Version 8.4.7.15
  • Version 8.4.7.22
  • Version 8.4.7.23
  • Version 8.4.7.26
  • Version 8.4.7.28
  • Version 8.4.7.29
  • Version 8.5.1
  • Version 8.5.1.1
  • Version 8.5.1.6
  • Version 8.5.1.7
  • Version 8.5.1.14
  • Version 8.5.1.17
  • Version 8.5.1.18
  • Version 8.5.1.19
  • Version 8.5.1.21
  • Version 8.5.1.24
  • Version 8.6.1
  • Version 8.6.1.1
  • Version 8.6.1.2
  • Version 8.6.1.5
  • Version 8.6.1.10
  • Version 8.6.1.12
  • Version 8.6.1.13
  • Version 8.6.1.14
  • Version 8.6.1.17
  • Version 8.7.1
  • Version 8.7.1.1
  • Version 8.7.1.3
  • Version 8.7.1.4
  • Version 8.7.1.7
  • Version 8.7.1.8
  • Version 8.7.1.11
  • Version 8.7.1.13
  • Version 8.7.1.16
  • Version 8.7.1.17
  • Version 9.0.1
  • Version 9.0.2
  • Version 9.0.2.10
  • Version 9.0.3
  • Version 9.0.3.6
  • Version 9.0.3.8
  • Version 9.0.4
  • Version 9.0.4.1
  • Version 9.0.4.5
  • Version 9.0.4.7
  • Version 9.0.4.17
  • Version 9.0.4.20
  • Version 9.0.4.24
  • Version 9.0.4.26
  • Version 9.0.4.29
  • Version 9.0.4.33
  • Version 9.0.4.35
  • Version 9.0.4.37
  • Version 9.1(7)4
  • Version 9.1.1
  • Version 9.1.1.4
  • Version 9.1.2
  • Version 9.1.2.8
  • Version 9.1.3
  • Version 9.1.3.2
  • Version 9.1.4
  • Version 9.1.4.5
  • Version 9.1.5
  • Version 9.1.5.10
  • Version 9.1.5.12
  • Version 9.1.5.15
  • Version 9.1.5.21
  • Version 9.1.6
  • Version 9.1.6.1
  • Version 9.1.6.4
  • Version 9.1.6.6
  • Version 9.1.6.8
  • Version 9.1.6.10
  • Version 9.2(0.0)
  • Version 9.2(0.104)
  • Version 9.2(3.1)
  • Version 9.2.1
  • Version 9.2.2
  • Version 9.2.2.4
  • Version 9.2.2.7
  • Version 9.2.2.8
  • Version 9.2.3
  • Version 9.2.3.3
  • Version 9.2.3.4
  • Version 9.2.4
  • Version 9.2.4.2
  • Version 9.2.4.4
  • Version 9.3(1.50)
  • Version 9.3(1.105)
  • Version 9.3(2.100)
  • Version 9.3(2.243)
  • Version 9.3.1
  • Version 9.3.1.1
  • Version 9.3.2
  • Version 9.3.2.2
  • Version 9.3.3
  • Version 9.3.3.1
  • Version 9.3.3.2
  • Version 9.3.3.5
  • Version 9.3.3.6
  • Version 9.3.5
  • Version 9.4.0.115
  • Version 9.4.1
  • Version 9.4.1.1
  • Version 9.4.1.2
  • Version 9.4.1.3
  • Version 9.4.1.5
  • Version 9.4.2
  • Version 9.4.2.3
  • Version 9.5.1
  • Version 9.5.2
  • Version 9.6.0
  • Version 9.6.1

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2016-6432
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2016-6432